Finding Unknown Angle Measures

Front

What is the measure of angle X if it is given as 133°?

Back

Angle X measures 133°.

Front

What do you call two angles whose sum equals 180 degrees?

Back

Supplementary Angles.

Front

If angle A is 90° and angle B is 90°, what is the sum of angle A and angle B?

Back

The sum is 180°.

Front

What is the value of x if it is given as 18°?

Back

x = 18°.

Front

What do you call two angles that share a common side?

Back

Adjacent Angles.

Front

What is the measure of angle X if it is given as 129°?

Back

Angle X measures 129°.

Front

If angle A is 60° and angle B is 120°, what type of angles are they?

Back

They are Supplementary Angles.

Front

What is the definition of complementary angles?

Back

Two angles whose sum is 90 degrees.

Front

What is the measure of a right angle?

Back

A right angle measures 90°.

Front

If angle A is 45° and angle B is 45°, what is the relationship between them?

Back

They are complementary angles.