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# Geometry Chapter 2

### McDougal Littell Vocab.

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

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