| A | B |
|---|
| angle | formed by two rays that meet at a common point |
| right angle | 90° angle |
| obtuse angle | angle greater than 90°, less than 180° |
| acute angle | angle less than 90° |
| straight angle | angle equal to 180° |
| reflex angle | angle greater than 180°, less than 360° |
| complementary angles | two angles that equal 90° |
| supplementary angles | two angles that equal 180° |
| adjacent angles | angles that share a common vertex & side; next to each other |
| vertical angles | opposite angles that are formed when two lines intersect |
| corresponding angles | angles in the same position in two different groups of angles |
| alternate interior angles | alternate - on opposite sides of transversal; interior - inside the parallel lines |
| alternate exterior angles | alternate - on opposite sides of transversal; outside the parallel lines |
