Angle Relationships

Front

What are complementary angles?

Back

Complementary angles are two angles whose measures add up to 90 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

If two angles are supplementary, what is the relationship between their measures?

Back

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

Front

How do you find the measure of an unknown angle if you know one angle in a complementary pair?

Back

Subtract the known angle from 90 degrees.

Front

What is the definition of an angle?

Back

An angle is formed by two rays that share a common endpoint, called the vertex.

Front

What is the measure of a right angle?

Back

A right angle measures 90 degrees.

Front

How do you solve for an unknown angle in a linear pair?

Back

Set the sum of the two angles equal to 180 degrees and solve for the unknown angle.

Front

What is the relationship between vertical angles?

Back

Vertical angles are equal in measure.

Front

What is the formula to find the measure of an exterior angle of a triangle?

Back

The measure of an exterior angle is equal to the sum of the measures of the two non-adjacent interior angles.

Front

What is the definition of a straight angle?

Back

A straight angle measures 180 degrees.