| A | B |
|---|
| Angle | Two rays that share an endpoint |
| Acute angle | angles with the measure between 1-89 |
| Angle Bisector | a ray that divides an angle into two congruent angles |
| Complementary Angles | two angles when added together equals 90 |
| Linear Pair | two adjacent angles that form a straight line |
| Obtuse Angle | angles with the measure between 91 - 179 |
| Reflex Angle | angles with the measure between 181 -359 |
| Segment Bisector | segment, ray, line, or plane that intersects a segment at its midpoint |
| Supplementary Angles | two angles when added together equals 180 |
| Vertical Angles | two angles whose sides form opposite rays |
