Angle Relationships

Front

What are complementary angles?

Back

Complementary angles are two angles whose measures add up to 90 degrees.

Front

What are supplementary angles?

Back

Supplementary angles are two angles whose measures add up to 180 degrees.

Front

If one angle measures 30 degrees, what is the measure of its complementary angle?

Back

60 degrees.

Front

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

Back

60 degrees.

Front

What is the sum of the angles in a triangle?

Back

The sum of the angles in a triangle is always 180 degrees.

Front

What is the measure of each angle in an equilateral triangle?

Back

Each angle in an equilateral triangle measures 60 degrees.

Front

If two angles are equal and supplementary, what is the measure of each angle?

Back

Each angle measures 90 degrees.

Front

What is the relationship between vertical angles?

Back

Vertical angles are equal in measure.

Front

If two angles are complementary and one measures 45 degrees, what is the measure of the other angle?

Back

45 degrees.

Front

What is an angle?

Back

An angle is formed by two rays with a common endpoint called the vertex.