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McDougal Littell Vocab.

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A type of logical statement that has two parts, a hypothesis and a conclusion.   Conditional Statement  
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The form of a conditional statement that uses the words "if" and "then".   if-then form  
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The "if" part of a conditional statement.   Hypothesis  
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The "then" part of a conditional statement.   Conclusion  
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The statement formed by switching the hypothesis and conclusion of a conditional statement.   Converse  
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The statement formed when you negate the hypothesis and conclusion of a conditional statement.   Inverse  
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The statement formed when you negate the hypothesis and conclusion of the converse of a conditional statement.   Contrapositive  
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The negative of a statement. The negation symbol is ~.   Negation  
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Two statements that are both true or both false.   Equivalent Statement  
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Two lines that intersect to form a right angle.   Perpendicular Lines  
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A line that intersects the plane in a point and is perpendicular to every line in the plane that intersects it.   Line perpendicular to a Plane  
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A statement that contains the phrase "if and only if".   Bi conditional Statement  
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An argument based on deductive reasoning, which uses facts, definitions, and accepted properties in a logical order.   Logical Argument  
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If p → q is true conditional statement and p is true, then q is true.   Law of Detachment  
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If p → q and q → r are true conditional statement, then p → r is true.   Law of Syllogism  
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A true statement that follows as a result of other true statements.   Theorem  
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A type of proof written as numbered statements and reasons that show the logical order of an argument.   Two Column Proof  
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A type of proof written in paragraph form.   Paragraph Proof  
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