Angles and Relationships

Front

What are vertical angles?

Back

Vertical angles are the angles opposite each other when two lines intersect. They are always equal in measure.

Front

If two angles are complementary, what is the sum of their measures?

Back

The sum of the measures of two complementary angles is 90 degrees.

Front

If two angles are supplementary, what is the sum of their measures?

Back

The sum of the measures of two supplementary angles is 180 degrees.

Front

What is the measure of an angle if it is complementary to a 25° angle?

Back

The measure of the angle is 65° (90° - 25° = 65°).

Front

What is the measure of an angle if it is supplementary to a 90° angle?

Back

The measure of the angle is 90° (180° - 90° = 90°).

Front

Back

Front

Back

Front

What is the relationship between adjacent angles formed by two intersecting lines?

Back

Adjacent angles are angles that share a common side and vertex, and their measures add up to 180 degrees.

Front

Back

The measure of the supplementary angle is 141° (180° - 39° = 141°).

Front

What is the measure of the missing angle if one angle is 39° and they are complementary?

Back

The measure of the missing angle is 51° (90° - 39° = 51°).