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15 Cards in this Set

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 Two angles in a plane that share a common vertex and a common side but no interior points in common. Adjacent angles A statement using "if and only if" Biconditional The phrase following the word then in a conditional statement; the final statement of an agrument. conclusion A statement that can be written in the form "If p, then q," where p is the hypothesis and q is the conclusion. conditional satement The statement formed by interchanging the hypothesis and conclusion of a conditional statement. converse An example that proves that a statement, often a conjecture, is false. counterexample The process of drawing conclusions by using logical reasoning in an argument. deductive reasoning The phrase following the word IF in a conditional statement hypothesis Forming conjectures on the basis of observations. inductive reasoning A series of logically linked conditional statements. Logical chain A form of proof in which one's reasoning is explained in paragraph form, as opposed to flow chart or two-column proofs. Paragrph proof The oppostie angles formed by two intersecting lines. Vertical angles A convincing argument that uses logic to show that a statement is true Proof A statement that has been proven to be true deductively Theorem A proof in which the statements are written in the left hand column and the reasons are given in the right hand column Two Column Proof