| A | B |
|---|
| Midpoint | The point that divides a segment into two congruent segments |
| Segment Bisector | A segment, ray, line, or plane that intersects a segment at its midpoint |
| Angle Bisector | A ray that divides an angle into two adjacent angles that are congruent |
| Straightedge | A ruler without marks |
| Construction | A drawing that uses a straightedge and compass |
| Compass | A tool used to create circles and arcs |
| Vertical Angles | Two angles whose sides for two pair of opposite rays |
| Linear Pair | Two adjacent angles whose noncommon sides are opposite rays |
| Supplementary Angles | Two angles whose sum is 180 degrees |
| Complementary Angles | Two angles whose sum is 90 degrees |
| Supplement | The 2nd of two numbers that add up to be 180 |
| Complement | The 2nd of two numbers that add up to be 90 |
