Angle Relationships

Front

What are Vertical Angles?

Back

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

Front

What is the sum of complementary angles?

Back

The sum of complementary angles is 90 degrees.

Front

What are Alternate Interior Angles?

Back

Alternate interior angles are pairs of angles that lie between two lines and on opposite sides of a transversal. They are equal when the lines are parallel.

Front

What are Corresponding Angles?

Back

Corresponding angles are pairs of angles that are in the same position on two parallel lines in relation to a transversal. They are equal.

Front

What are Alternate Exterior Angles?

Back

Alternate exterior angles are pairs of angles that lie outside two lines and on opposite sides of a transversal. They are equal when the lines are parallel.

Front

If angle A is 40°, what is the measure of its complement?

Back

The measure of the complement of angle A is 50°.

Front

If two angles are supplementary and one angle measures 70°, what is the measure of the other angle?

Back

The measure of the other angle is 110°.

Front

Identify a pair of complementary angles.

Back

81° and 9° are complementary angles because their sum is 90°.

Front

What is the relationship between corresponding angles when two lines are parallel?

Back

Corresponding angles are equal when two lines are parallel.

Front

What is the measure of angle 8 if angle 4 is 50° and they are corresponding angles?

Back

Angle 8 measures 50°.