Angle Relationships & Equations

Front

What are complementary angles?

Back

Angles that add up to 90°.

Front

What are supplementary angles?

Back

Angles that add up to 180°.

Front

What is an adjacent angle?

Back

An angle that is next to another angle.

Front

If two angles are supplementary and one angle measures 120°, what is the measure of the other angle?

Back

60°.

Front

If two angles are complementary and one angle measures 40°, what is the measure of the other angle?

Back

50°.

Front

What is the sum of the angles in a triangle?

Back

180°.

Front

What is the measure of each angle in a right triangle?

Back

One angle measures 90°, and the other two angles add up to 90°.

Front

If angle 5 is 45°, what is the measure of an angle adjacent to it that is supplementary?

Back

135°.

Front

What is the definition of vertical angles?

Back

Angles that are opposite each other when two lines intersect.

Front

If angle A is 30° and angle B is its adjacent angle, what is the measure of angle B if they are complementary?

Back

60°.