| A | B |
| Converse | The statement formed by interchanging the hypothesis and conclusion of a conditional statement. (q → p) |
| Conjecture | A conclusion you reach using inductive reasoning. |
| Collinear | Points that are on the same line. |
| Deductive reasoning | Reasoning based on fact. |
| Bisector | Divides an angle into 2 congruent angles. |
| Complementary angles | Two angles whose sum is 90o. |
| Acute angle | An angle that has a measure less than 90o. |
| Midpoint | The point that separates a segment into congruent parts. |
| Supplementary angles | Two angles whose sum is 180o. |
| Perpendicular lines | Lines that intersect to form right angles. |