| A | B |
|---|
| If M is a midpoint of AB, | then AM = MB. |
| If ray BD bisects angle ABC, | then angle ABD = angle DBC |
| If BD bisects segment AC at point B, | then AB = BC |
| If line a is perpendicular to line b, | then line a and line b form a right angle. |
| If angle 1 and angle 2 are vertical, | then angle 1 is congruent to angle 2 |
| Linear pairs are _________ | supplementary |
| Two angles that form a right angle are _________ | complementary |
| If angle 1 and angle 2 are right angles, | then angle 1 = angle 2 = 90. |
| Vertical angles are _____________ | congruent |
| Perpendicular lines form __________ | 4 right angles |
| A statement or fact accepted to be true | postulate |
| Reasoning based on observed patterns | inductive reasoning |
| Reasoning that uses facts, rules, definitions, or properties to reach logical conclusions. | deductive reasoning |
| an educated guess | conjecture |
| a false example | counterexample |
| an if-then statement | conditional statement |
| exchanges the hypothesis & conclusion | converse |
| negates the hypothesis & conclusion | inverse |
| exchanges and negates the hypothesis & conclusion | contrapositive |
