geometry Vocabulary Chapter 2

A statement that might be true, which can then be tested. The "if" part of a conditional statement.

• Conclusion

• Hypothesis

• Inverse

• Converse

Switching the hypothesis and conclusion of a conditional statement.

• Inverse

• Negation

• Contrapositive

• Converse

Lines that are at right angles (90°) to each other.

• Perpendicular Lines

• Parallel Lines

• Skew Lines

• Equation

The attribute assigned to a proposition in respect of its truth or falsehood, which in classical logic has only two possible values (true or false).

• Truth Value

• Converse

• Inverse

• Conditional Statement

Switching the hypothesis and conclusion of a conditional statement and negating both.

• Inverse

• Converse

• Contrapositive

• Conditional Statement

A process that includes looking for patterns and making conjectures.

• Counterexample

• Inductive Reasoning

• Deductive Reasoning

• Postulate

Statement accepted as true without proof.

• Statement

• Property

• Theorem

• Postulate

An unproven statement that is based on observations. An educated guess.

• Converse

• Conjecture

• Fact

• Proof

Statements that are written differently, but hold the same logical equivalence.

• Negation

• Linear pair

• Vertical Angle

• Equivalent Statements

Two acute angles that add up to 90°.

• Complimentary Angles

• Supplementary angles

• Linear Pairs

• Vertical Angles