Learn about the common pairs of angles including vertical, supplementary and complementary angles.

Some information to remember:

Two intersecting lines form 4 separate angles. The angles opposite of each other will always equal to each other, which are also known as vertical angles.

Complementary angles are two angles that add up to  90^\circ . This means that if you have one complementary angle, you can find the second angle by subtracting the given angle from 90.

Supplementary angles are two angles that add up to  180^\circ . Just like complementary angles, you can subtract your given angle from 180 to find the second angle.