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Angles
| Term | Definition |
|---|---|
| Angle | two rays with the same endpoint. |
| Sides (of an angle) | the rays of the angle. |
| Vertex (of an angle) | the endpoint of the angle. |
| Adjacent Angles | two coplanar angles with a common side, a common vertex, and no common interior points. |
| Vertical Angles | two angles whose sides are opposite rays. |
| Complementary Angles | two angles whose measures have a sum of 90. |
| Supplementary Angles | two angles whose measure have a sum of 180. |
| Acute Angles | Angles with a measure less than 90 degrees. |
| Obtuse Angles | Angles with a measure more than 90 degrees. |
| Right Angles | Angles with a measure of exactly 90 degrees. |