| A | B |
|---|
| Same side interior | when two parallel lines are intersecting by a transversal, and are angles on the same side of the transversal in between parallel lines. Their sum is 180 degrees. |
| Complementary Angles | Angles that add up to 90 degrees. |
| Supplementary Angles | Two or more angles that add up to 180 degrees. |
| Alternate Exterior Angles | When two parallel lines are interesting by a transversal and are angles on opposite sides of the transversal outside the parallel lines. They are congruent. |
| Corresponding Angles | When two parallel lines are intersecting by a traversal and are angles that are in the same location. They are congruent. |
| Alternate Interior Angles | When two parallel lines are intersecting by a transversal and are on opposite sides of the travsversal and are inside the parallel lines. They are congruent. |
| Vertical Angles | Formed when two lines interect each other. They share a vertex, not a side, and are across from each other. They are congruent. |
| The 3 angles of a triangle add to ? | 180 degrees. |
