Angles

Linear Angles

A pair of angles that are adjacent to each other and add together to make 180 degrees.

Alternate Interior Angle

The pairs of angles located inside the parallel lines (interior) and on opposite sides (alternate) of the transversal. These angles are congruent.

Same Side Interior Angles

The pairs of angles located inside the parallel lines (interior) and on the same side of the transversal. These angles are supplementary (they have a sum of 180 degrees)

Same Side Exterior Angles

The pairs of angles located outside the parallel lines (exterior) and on the same side as the transversal. These angles are supplementary (they have a sum of 180 degrees)

Corresponding Angles

These angles are in the same position in different intersections. If you translated one intersection to the other, these angles would correspond. These angles are congruent.

Vertical Angles

These angles are opposite of each other in the same intersection. They share the same vertex, They are congruent.

Supplementary Angles

These angles have a sum of 180 degrees. The form a straight line.

Complementary Angles

These angles have a sum of 90 degrees. They form a right angles.

Alternate Exterior Angles

These pairs of angles located outside the parallel lines (exterior) and on opposite sides (alternate) of the transversal. These angles are congruent.