| A | B |
|---|
| Acute Angle | Measures greater than zero degrees and less than 90 degrees |
| Right Angle | Equals 90 degrees |
| Obtuse Angle | Measures greater than 90 degrees and less than 180 degrees |
| Straight Angle | Equals 180 degrees |
| Complementary Angles | Two angles for which the sum of their measures is 90 degrees |
| Supplementary Angles | Two angles for which the sum of their measures is 180 degrees |
| Adjacent Angles | Two angles that share a common side but do not overlap each other |
| Vertical Angles | When two lines intersect, the angles that are not adjacent. They are always equal in measure |
| Reflex Angle | Measures greater than 180 degrees and less that 360 degrees |
