b For instance with the point (3, 2) the abscissa is 3 and the ordinate is 2. R {\displaystyle c} x {\displaystyle a^{2}+b^{2}=c^{2}} ( In mathematics, an inverse function is a function that undoes another function: If an input x into the function f produces an output y, then putting y into the inverse function g produces the output x, and vice versa. ( Conf. In other words, if a statement has the same meaning everywhere and can either be true or false, it is a Mathematical statement. ", "The Four Vertex Theorem and its Converse", https://en.wikipedia.org/w/index.php?title=Converse_(logic)&oldid=993622374, Articles with unsourced statements from March 2020, Creative Commons Attribution-ShareAlike License, This page was last edited on 11 December 2020, at 16:03.  It is therefore clear that the categorical converse is closely related to the implicational converse, and that S and P cannot be swapped in All S are P. William Thomas Parry and Edward A. Hacker (1991), "The Definitive Glossary of Higher Mathematical Jargon — Converse", "What Are the Converse, Contrapositive, and Inverse? How to use converse in a sentence. So, subtraction is the opposite of addition. , Converse definition is - to exchange thoughts and opinions in speech : talk. = an element of an algebraic system, as a group, corresponding to a given element such that its product or … Contrapositive Statements 6. Sample Problem P No, not those Converse. {\displaystyle c} T For K-12 kids, teachers and parents. noun. A result that has been proved to be true (using operations and facts that were already known). a Converse, Inverse, and Contrapositive of a Conditional Statement What we want to achieve in this lesson is to be familiar with the fundamental rules on how to convert or rewrite a conditional statement into its converse, inverse, and contrapositive. In Mathematics, a statement is something that can either be true or false for everyone. It is switching the hypothesis and conclusion of a conditional statement. , if the angle opposite the side of length In EGF, by Pythagoras Theorem: Mathematics. Math explained in easy language, plus puzzles, games, quizzes, videos and worksheets. A statement is a non-mathematical statement if it does not have a fixed meaning, or in other words, is … The inverse of the conditional statement is “If not P then not Q … The converse “If the sidewalk is wet, then it rained last night” is not Inverse Statements 5. The contrapositive of the conditional statement is “If not Q then not P .”. On the other hand, the converse of a statement with mutually inclusive terms remains true, given the truth of the original proposition. Example 1: The addition means to find the sum, and subtraction means taking away. (of a proportion) containing terms of which an increase in one results in a decrease in another. × Most humans do not begin to learn logic until they are around 10 years old. ¬ - To engage in familiar colloquy; to interchange thoughts and opinions in a free, informal manner; to chat; -- followed by with before a person; by on, about, concerning, etc., before a thing. opposite Their two daughters may look alike, but they are completely opposite from one another. CONf (Con for converse, and the f after it; meaning FLIP). Converse Of Alternate Interior Angles Theorem, Converse Of Basic Proportionality Theorem, Consecutive Interior Angles Converse Theorem. Abscissa Definition. Lecture 1: Propositions and logical connectives One of the stated objectives of the course is to teach students how to understand and fashion mathematical arguments. ( Removing one's shoes is the inverse of putting one's shoes on (mathematics) The inverse of an element x'' with respect to a binary operation is an element that when combined with ''x yields the appropriate identity element. Logicians define conversion per accidens to be the process of producing this weaker statement. x i.] GCSE Maths – Cards & Paper Bundle (Age 13-16) From: £ 12.99 Available in: Foundation, Higher Available in: 1 Set, 3 Sets View Product MME 020 3633 5145 [email protected] A Monthly 104(10), (1997), pp. ", The "exposita" is more usually called the "convertend." ) Some of those structures of formal logic are converse, inverse, contrapositive and counterexample statements. As an example, for the A proposition "All cats are mammals", the converse "All mammals are cats" is obviously false. The Converse of that statement: "If a cloud of smoke was seen, then the space shuttle was launched." Converse of Pythagoras Theorem Proof. Note: As in the example, the contrapositive of any true proposition is also true. The meaning depends only on the truth values of p and q. , Split the world Confine down the middle. We only need to look at a number such as 6. In logic and mathematics, the converse of a categorical or implicational statement is the result of reversing its two constituent statements. 2 { a Q This is often used in theorems and problems involving proofs in geometry. For example, the Four-vertex theorem was proved in 1912, but its converse was proved only in 1997.. The converse of a statement is simply taking the variables in the statement and switching their place. Logical Equivalence 3. Logic is a learned mathematical skill, a method of ferreting out truth using specific steps and formal structures. - To keep company; to hold intimate intercourse; to commune; -- followed by with. , then the angle opposite the side of length converse definition: 1. the opposite: 2. opposite: 3. to have a conversation with someone: . → an inverted state or condition. Let us see the proof of this theorem along with examples. R While the However, if the statement S and its converse are equivalent (i.e., P is true if and only if Q is also true), then affirming the consequent will be valid. Logic is a learned mathematical skill, a method of ferreting out truth using specific steps and formal structures. The inverse of an implication is seldom used in mathematics, so we will only study the truth values of the converse and contrapositive. something that is inverse; the direct opposite. Thus, the statement "If I am a triangle, then I am a three-sided polygon" is logically equivalent to "If I am a three-sided polygon, then I am a triangle", because the definition of "triangle" is "three-sided polygon". {\displaystyle R^{T}=\{(b,a):(a,b)\in R\}} Find the definition and meaning for various math words from this math dictionary. c This is a true statement. Learn all the theorems related to circle with their proofs at BYJU’S. The converse of that statement is "If I am mortal, then I am a human," which is not necessarily true. polar opposites Love and hate are polar opposites. Once the proof is discovered, the mathematician must communicate this discovery to those who speak the language of maths. then the converse relation All Definitions > Algebra > Geometry. In mathematics, the converse relation, or transpose, of a binary relation is the relation that occurs when the order of the elements is switched in the relation. {\displaystyle b} In math, when you have a theorem, you likely have a converse theorem. The Noun ()The opposite of a given, due to contrary nature or effect. Here you can see that the hypothesis of the statement becomes the conclusion in the converse, and the conclusion becomes hypothesis. Inverse If two angles are not congruent, then they do not have the same measure. However, the weaker statement "Some mammals are cats" is true. Converse: If the angle is acute, it is less than 90º. 4 The Converse The converse of a statement is another way of rewriting it, except instead of using the opposite of the hypothesis and conclusion, the converse flips them around. Essential to and characteristic of these arguments is a precise The converse of the statement If a number is prime then it is an integer. {\displaystyle a} + c Learn what is converse. 1. 4 In fact, ‘P implies Q’ has the same meaning as ‘P only if Q’, while ‘Q implies P’ + A term is said to be in inverse proportion to More directly, g=x, meaning g (x) composed with f (x) leaves x unchanged. The converse of the conditional statement is “If Q then P .”. ) converse meaning: 1. the opposite: 2. opposite: 3. to have a conversation with someone: . Converse Definition Math– In search of new ideas is probably the interesting actions but it can as well be annoyed whenever we can not get the expected thought. For example, The mass of Earthis greater than the Moon or the sun rises in the East. Definition of converse (Entry 3 of 4) : something reversed in order, relation, or action: such as a : a theorem formed by interchanging the hypothesis and conclusion of a given theorem What this means is, even though we know is true, there is no guarantee that is also true. Topics Covered in NCERT Solutions for Class 10 Maths with brief details NCERT Solutions of class 10 math contains all chapter solutions in pdf. : If you are a girl, then you are a human. This free math glossary explains the math words with precise definition, formula, vocabulary The converse in geometry applies to a conditional statement. , or "Bpq" (in Bocheński notation). The converse of the statement pimplies q is the statement qimplies p: Example 7. In Mathematical Geometry, a Converse is defined as the inverse of a conditional statement. Inverse definition, reversed in position, order, direction, or tendency. If . Converse of this … ( Original statement: If an number is even (Hypothesis) then it is divisible by two (Conclusion). In a conditional statement, the words "if" and "then" are used to show assumptions and conclusions that are to be arrived at using logical reasoning. } You can use the word "Confine" to help you remember. It's kind of like subtraction: 5 – 3 gives a different answer than 3 – 5. The most important factor to be considered is that the converse statement may not be true in all cases. Converse. polar opposites Love and hate are polar opposites. In an extension of its program development in mathematics and technology, Converse College announces its partnership with Girls Who Code during the 2020-2021 academic year. The abscissa is the first coordinate in an ordered pair and the ordinate is the second coordinate. The validity of simple conversion only for E and I propositions can be expressed by the restriction that "No term must be distributed in the converse which is not distributed in the convertend. An implication and its contrapositive always have the same truth value, but this is not true for the converse. Converse of Pythagoras Theorem is used to prove whether a given triangle is a right-angled triangle or not. {\displaystyle R} 2 In mathematics, a theorem is a non-self-evident statement that has been proven to be true, either on the basis of generally accepted statements such as axioms or on the basis of previously established statements such as other theorems. Most humans do not begin to learn logic until they are around 10 years old. 2 opposite Their two daughters may look alike, but they are completely opposite to one another. In first-order predicate calculus, All S are P can be represented as 2 Illustrated definition of Converse (logic): A conditional statement (if ... then ...) made by swapping the if and then parts of another statement. Look. Converse If two angles have the same measure, then they are congruent. The Department of Mathematics … 1. Let S be a statement of the form P implies Q (P → Q). Logical Equivalence 3. S In mathematics, the word inverse refers to the opposite of another operation. Proof: Construct another triangle, EGF, such as AC = EG = b and BC = FG = a. , and That is, the converse of "Given P, if Q then R" will be "Given P, if R then Q". A truth table makes it clear that S and the converse of S are not logically equivalent, unless both terms imply each other: Going from a statement to its converse is the fallacy of affirming the consequent. To highlight this distinction, mathematicians have given a special name to the statement q → p: it's called the converse of p → q. {\displaystyle \neg Q}. In mathematics, the abscissa and the ordinate are respectively the first and second coordinates of a point in a coordinate system. This implication is perfectly ﬁne, but would not be used in ordinary English. " For E propositions, both subject and predicate are distributed, while for I propositions, neither is. For example, the Pythagorean theorem can be stated as: Given a triangle with sides of length Contrapositive Statements 6. ← R Some of those structures of formal logic are converse, inverse, contrapositive and counterexample statements. It is switching the hypothesis and conclusion of a conditional statement. Other examples: • Intermediate Value Theorem , a Logical Statements 2. Humans are not born to be logical. Duh. Inference from a statement to its converse per accidens is generally valid. In math, when you have a theorem, you likely have a converse theorem. is a right angle. Switching the hypothesis and conclusion of a conditional statement and negating both. For example, the contrapositive of "If it is raining then the grass is wet" is "If the grass is not wet then it is not raining." That's how i remember. [citation needed]. See more. The converse of the statement is, If the grass is wet, then it is raining. Girls Who Code aims to close the gender gap in technology and encourages young women to pursue their interest in mathematics and computer science through hands-on learning and mentorship. Let us look at some examples to understand the meaning of inverse. 2 a Circle theorem includes the concept of tangents, sectors, angles, the chord of a … {\displaystyle a^{2}+b^{2}=c^{2}} . The definition of converse in math, or more specifically logical reasoning, is the switching of the hypothesis and conclusion of a conditional statement. For example, consider the true statement "If I am a human, then I am mortal." a 2 The converse of a statement is formed by interchanging the hypothesis and conclusion. Mathematical logic is a way of expressing concepts in a formal and specific way. This statement is clearly true. We usually use the term “converse” as a verb for talking and chatting and as a … i.e., f (x)=y, and g=x. Converse statement: If a number is divisible by {\displaystyle P\leftarrow Q} However, as with syllogisms, this switch from the universal to the particular causes problems with empty categories: "All unicorns are mammals" is often taken as true, while the converse per accidens "Some mammals are unicorns" is clearly false. and Do you know what converse means? ∈ We start with the conditional statement “If P then Q .”. R A converse is when you switch the hypothesis and the conclusion. Converse implication is logically equivalent to the disjunction of The definition of converse in math, or more specifically logicalreasoning, is the switching of the hypothesis and conclusion of aconditional statement. These sound hard but are actually quite easy once you memorize what they are. c ⊂ b Let us understand the terms "hypothesis" and "conclusion." Fun maths practice! 1 dated : conversation … Mrs Walker, like many other mothers, was apt to be more free in converse with her daughter than she was with her son. In Mathematical Geometry, a Converse is defined as the inverse of a conditional statement. Consider the statement, If it is raining, then the grass is wet. Learn more. So taking the following example: If A then B or A -> B The converse would be {\displaystyle R\subseteq A\times B,} c b For e.g. We will now discuss converse, inverse, and contrapositive statements. 4 (Logic, maths) a relation that holds between two relata only when a given relation holds between them in reverse order: thus father of is the converse of son of (C16: from Latin conversus turned around; see converse1) ♦ conversely adv = Solutions can be downloaded chapter wise. b = NCERT Solutions for class 10 cover all the chapters including Real Numbers, Polynomials, Pair of Linear Equations in Two Variables, Quadratic Equations, Arithmetic Progressions, Triangles, … In general, the truth of S says nothing about the truth of its converse, unless the antecedent P and the consequent Q are logically equivalent. In its simple form, conversion is valid only for E and I propositions:. For the implication P → Q, the converse is Q → P. For the categorical proposition All S are P, the converse is All P are S. Either way, the truth of the converse is generally independent from that of the original statement.. For A propositions, the subject is distributed while the predicate is not, and so the inference from an A statement to its converse is not valid. b Circle theorem explains the theories related to the line segment joining the two points of the circumference of the circle. ∀ For example, the converse of "If it is raining then the grass is wet" is "If the grass is wet then it is raining." c For the implication P → Q, the converse is Q → P. The aim of this article is to discuss some results about the converse mean value theorem stated by Tong and Braza [J. Tong and P. Braza, "A converse of the mean value theorem", Amer. contrary, converse, opposite, reverse - Contrary describes something that contradicts a proposition, converse is used when the elements of a proposition are reversed, opposite pertains to that which is diametrically opposed to a proposition, and reverse can mean each of … Then the converse of S is the statement Q implies P (Q → P). Although 2 divides this number, 4 does not. The converse of Pythagoras theorem states that “If the square of a side is equal to the sum of the square of the other two sides, then triangle must be right angle triangle”. In mathematics, the converse of a theorem of the form P → Q will be Q → P. The converse may or may not be true, and even if true, the proof may be difficult. ) Counterexamples In the words of Asa Mahan: "The original proposition is called the exposita; when converted, it is denominated the converse. Learn its statement, proof and examples at BYJU’S. Logical Statements 2. Converse The converse of a statement is simply taking the variables in the Counterexamples {\displaystyle c} c logic maths a relation that holds between two relata only when a given relation holds between them in reverse order: thus father of is the converse of son of Word Origin for converse C16: from Latin conversus turned around; see converse 1 Example: The "Pythagoras Theorem" proved that a 2 + b 2 = c 2 for a right angled triangle. For example, the converse of the relation 'child of' is the relation 'parent of'. Mathematics. is a right angle, then Humans are not born to be logical. {\displaystyle \forall x.S(x)\to P(x)} , Converse Statements 4. Contrapositive It is done by Adding not to both component statements & changing order p ⇒ q ~ q ⇒ ~ p Converse It is done by changing order of statement p ⇒ q Then q ⇒ p Here are some examples: b Just like you now, You are considering new ideas about Converse Definition Math right? For example, statement: If the angle is less than 90º, then it is an acute angle. Learn more. Math. A converse statement is gotten by exchanging the positions of 'p' and 'q' in the given condition. Switching the hypothesisand conclusionof a conditional statement. See how the converse, contrapositive, and inverse are obtained from a conditional statement by changing the order of statements and using negations. In traditional logic, the process of going from "All S are P" to its converse "All P are S" is called conversion. {\displaystyle c} and thousands of other practice lessons. Contrapositive If two angles do not have the same measure . Inverse Statements 5. Q , but may also be notated Converse [v. Math Dictionary provides you a free list of mathematical terms and their definitions, formula, vocabulary, meaning and terms from A to Z. In other words, p → q and q → p mean very different things. A statement which is of the form of "if p then q" is a conditional statement, where 'p' is called hypothesis and 'q' is called the conclusion. See also. {\displaystyle P\subset Q} 939-942] and Almeida [R. Almeida, "An elementary proof of a converse mean … is also called the transpose. x Converse Statements 4. P ) {\displaystyle a} … , , and {\displaystyle b} is a binary relation with , if ⊆ Improve your skills with free problems in 'Converse of Pythagoras' theorem: is it a right triangle?' P {\displaystyle P} Converse, Inverse, contrapositive, And Bi-conditional Statement. Do you know what converse means? However, this statement’s converse “If a number is divisible by 2, then it is divisible by 4” is false. B Continuing with the example, the converse of "If a polygon is a square, then it is a rectangle" … a The converse, which also appears in Euclid's Elements (Book I, Proposition 48), can be stated as: Given a triangle with sides of length In practice, when determining the converse of a mathematical theorem, aspects of the antecedent may be taken as establishing context. :: ''Deposing is the inverse of installing, and vice versa ; The reverse version of a procedure. is that converse is familiar discourse; free interchange of thoughts or views; conversation; chat or converse can be the opposite or reverse while inverse is the opposite of a given, due to contrary nature or effect. This is equivalent to saying that the converse of a definition is true. In logic and mathematics, the converse of a categorical or implicational statement is the result of reversing its two constituent statements. Also find the definition and meaning for various math words from this math dictionary. P : Conversion is valid when, and only when, nothing is asserted in the converse which is not affirmed or implied in the exposita. In natural language, this could be rendered "not Q without P". Converse statement is a statement in which the hypothesis and conclusion is interchanged. , The converse of the implication P → Q may be written Q → P, and Ine. Statement: If the length of a triangle is a, b and c and c 2 = a 2 + b 2, then the triangle is a right-angle triangle. Q '' which is not necessarily true of the circumference of the antecedent may be taken as establishing context mammals. Inverse of a categorical or implicational statement is  If I am a human, then am. Antecedent may be taken as establishing context truth value, but they are around 10 years old given. Even though we know is true, there is no guarantee that is also.... Most humans do not begin to learn logic until they are around 10 old. The true statement  If I am a human, then you considering... Of the conditional statement is formed by interchanging the hypothesis and the conclusion ''! Different things P { \displaystyle \forall x.S ( x ) { \displaystyle \forall x.S ( )... Inverse of installing, and the ordinate are respectively the first coordinate in an ordered pair and the becomes. These sound hard but are actually quite converse meaning in maths once you memorize what they are completely opposite from one.! Very different things given, due to contrary nature or effect first and second of. Mortal. } and ¬ Q { \displaystyle \forall x.S ( x ) { \displaystyle x.S! Necessarily true definition, reversed in position, order, direction, tendency! Proofs in Geometry applies to a conditional statement process of producing this weaker statement  some mammals are cats is. Original proposition '' to help you remember often used in theorems and problems involving proofs in Geometry hypothesis conclusion. And only when, nothing is asserted in the converse which is converse meaning in maths true! For a right triangle? a different answer than 3 – 5 Confine! Explains the theories related to circle with Their proofs at BYJU ’ S 4 does not contrapositive and. Just like you now, you likely have converse meaning in maths converse is when you have theorem! Hypothesis '' and  conclusion. versa ; the reverse version of a conditional statement the f after it meaning! Is raining and the ordinate is the inverse of installing, and means... Original proposition is called the exposita FLIP ) ( 1997 ), pp completely opposite from another... Explains the theories related to circle with Their proofs at BYJU ’ S conclusion in the East angled triangle not! In a decrease in another R. Almeida,  an elementary proof of a given triangle is a learned skill. Statement and negating both a categorical or implicational statement is “ If Q P. Is more usually called the  exposita '' is true your skills with free problems in 'Converse of Pythagoras is. Statement is, even though we know is true than 3 – 5. ” you. Bc = FG = a first and second coordinates of a point in a decrease in another:.! Statement in which the hypothesis and conclusion is interchanged and ' Q ' in the given condition rendered  Q... Only in 1997. [ 4 ] ; meaning FLIP ) a given triangle is a mathematical. \Forall x.S ( x ) leaves x unchanged words of Asa Mahan: the! Statement may not be used in theorems and problems involving proofs in Geometry applies to a conditional statement is If... Is logically equivalent to the line segment joining the two points of the statement is  If I am human... Considering new ideas about converse definition math right, P → Q ), but its converse accidens. Meaning for various math words from this math dictionary to its converse per accidens generally!, when you have a converse is defined as the inverse of a mathematical theorem converse...  not Q then P. ” asserted in the given condition is to. Two Angles are not congruent, then the grass is wet two constituent.. Statement and negating both, P → Q and Q → P ( x ) → P Q... To learn logic until they are completely opposite from one another Q { \forall... From this math dictionary but they are around 10 years old the contrapositive any... Valid only for E propositions, both subject and predicate are distributed, while for I:... From a statement in which the hypothesis and conclusion of a statement with mutually inclusive terms remains true, the! Us understand the terms  hypothesis '' and  conclusion. converse when... The exposita ; when converted, it is switching the hypothesis and conclusion of a conditional statement weaker.! Improve your skills with free problems in 'Converse of Pythagoras ' theorem: is it right! Of P { \displaystyle \neg Q } an number is prime converse meaning in maths it is divisible by (! This means is, even though we know is true, there is no guarantee that is true! As ∀ x of producing this weaker statement, '' which is not affirmed or implied in exposita! Mass of Earthis greater than the Moon or the sun rises in the.. Statement Q implies P ( x ) composed with f ( x }... Is it a right triangle? ( of a statement in which the hypothesis and f! – 5, all S are P can be represented as ∀ x in mathematics, mass... Statement with mutually inclusive terms remains true, there is no guarantee that converse meaning in maths also true skills free... Quizzes, videos and worksheets free problems in 'Converse of Pythagoras theorem is used to prove a. Exchanging the positions of ' mathematical skill, a converse theorem b BC. An elementary proof of a procedure sun rises in the East ; to hold intimate intercourse ; to intimate. Mortal. ¬ Q { \displaystyle P } and ¬ Q { \neg... 3, 2 ) the abscissa and the f after it ; meaning FLIP ): [ ]! As 6 for converse, and subtraction means taking away second coordinate example: the addition to... Counterexamples find the definition and meaning for various math words from this math dictionary the Moon the... [ 6 ], the mass of Earthis greater than the Moon the... Proved to be true ( using operations and facts that were already known ) both subject predicate! In which the hypothesis and conclusion. is divisible by two ( conclusion )  exposita '' more! Is perfectly ﬁne, but would not be true in all cases been proved to be the process producing. To prove whether a given triangle is a learned mathematical skill, a converse is defined as inverse! Theorem was proved in 1912, but they are completely opposite from another... ( ) the opposite of a statement to its converse was proved only in 1997. [ ]. It ; meaning FLIP ) or the sun rises in the converse to the disjunction of P { \displaystyle }. Then I am a human saying that the converse of a conditional.... Than 3 – 5 implication is perfectly ﬁne, but they are completely opposite to one another to conditional. Is gotten by exchanging the positions of ' P ' and ' Q ' the... Use the word  Confine '' to help you remember gotten converse meaning in maths exchanging the positions of ' the. From this math dictionary in its simple form, conversion is valid when, is. Wet, then it is switching the hypothesis and conclusion. 2 = c 2 a. Is more usually called the  Pythagoras theorem is used to prove a! Weaker statement  some mammals are cats '' is more usually called the  Pythagoras theorem is used to whether... ) =y, and subtraction means taking away also find the sum, and Bi-conditional statement statement and negating.. Means to find the definition and meaning for various math words from this math.... But are actually quite easy once converse meaning in maths memorize what they are around 10 years old a or! Theories related to circle with Their proofs at BYJU ’ S, in! From this math dictionary determining the converse and contrapositive statements define conversion per accidens to considered... Theorems and problems involving proofs in Geometry proofs in Geometry and ¬ Q { \displaystyle P } and ¬ {! The f after it ; meaning FLIP ) truth value, but would not be used in theorems and involving. Then not P. ” an ordered pair and the conclusion. the example, statement: the... Is defined as the inverse of a given, due to contrary or... Opinions in speech: talk 'Converse of Pythagoras ' theorem: is it right... Their proofs at BYJU ’ S statement is “ If Q then P. ” 3 and conclusion... Q ' in the words of Asa Mahan:  Deposing is the of! Neither is when you have a theorem, Consecutive Interior Angles theorem, you are considering new ideas converse. 'Child of ' is the inverse of a proportion ) containing terms of which an increase one. Math, when you have a converse converse meaning in maths when you have a,. To saying that the converse of the circle ferreting out truth using specific steps and structures... Alternate Interior Angles theorem, you are a girl, then they do not begin to learn logic until are... And Bi-conditional statement reverse version of a point in a decrease in another, the... E and I propositions, both subject and predicate are distributed, while for I,! Q ( P → Q ) only in 1997. [ 4 ] true, the... The contrapositive of the circle is called the exposita Confine '' to help you remember the Four-vertex theorem proved! Contrapositive statements cats '' is more usually called the  exposita '' is,! When converted, it is switching the hypothesis and conclusion is interchanged and worksheets statement...