Flashcard-Angles

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 angle E is 48° and angle F is a vertical angle, what is the measure of angle F?

Back

Angle F is also 48° because vertical angles are equal.

Front

What are complementary angles?

Back

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

Front

If angle A is 30°, what is the measure of its complementary angle B?

Back

Angle B is 60° because 90° - 30° = 60°.

Front

What are supplementary angles?

Back

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

Front

If angle D is 80°, what is the measure of angle C if they are supplementary?

Back

Angle C is 100° because 180° - 80° = 100°.

Front

What is the measure of angle Y if angle X is 45° and they are vertical angles?

Back

Angle Y is 45° because vertical angles are equal.

Front

If angle A is 30° and angle B is complementary to angle A, what is angle B?

Back

Angle B is 60°.

Front

What is the formula to find the measure of a complementary angle?

Back

The formula is: Complementary Angle = 90° - Given Angle.

Front

What is the formula to find the measure of a supplementary angle?

Back

The formula is: Supplementary Angle = 180° - Given Angle.