2/25/21 Angle Relationships

Front

What are supplementary angles?

Back

Two angles are supplementary if the sum of their measures is 180 degrees.

Front

What is the measure of a right angle?

Back

A right angle measures 90 degrees.

Front

What are vertical angles?

Back

Vertical angles are the angles opposite each other when two lines intersect, and they are always congruent (equal in measure).

Front

How do you find the measure of an unknown angle when given supplementary angles?

Back

Subtract the known angle from 180 degrees.

Front

What is the sum of the interior angles of a triangle?

Back

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

Front

What is the relationship between complementary angles?

Back

Two angles are complementary if the sum of their measures is 90 degrees.

Front

If one angle measures 76 degrees, what is the measure of its supplementary angle?

Back

The supplementary angle measures 104 degrees (180 - 76 = 104).

Front

If two angles are vertical angles, what can be said about their measures?

Back

Vertical angles are always equal in measure.

Front

How do you find the measure of an unknown angle when given complementary angles?

Back

Subtract the known angle from 90 degrees.

Front

What is the measure of an angle that is supplementary to a 130-degree angle?

Back

The supplementary angle measures 50 degrees (180 - 130 = 50).