Angles from Parallel Lines & Transversal

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

What are corresponding angles?

Back

Corresponding angles are the angles that are in the same position at each intersection where a straight line crosses two others. They are equal when the lines are parallel.

Front

What are alternate interior angles?

Back

Alternate interior angles are the pairs of angles on opposite sides of the transversal but inside the two lines. They are equal when the lines are parallel.

Front

What are alternate exterior angles?

Back

Alternate exterior angles are the pairs of angles on opposite sides of the transversal but outside the two lines. They are equal when the lines are parallel.

Front

What are supplementary angles?

Back

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

Front

What are complementary angles?

Back

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

Front

If Angle 1 and Angle 2 are supplementary, and Angle 1 measures 120 degrees, what is the measure of Angle 2?

Back

Angle 2 measures 60 degrees.

Front

If Angle 3 and Angle 4 are complementary, and Angle 3 measures 30 degrees, what is the measure of Angle 4?

Back

Angle 4 measures 60 degrees.

Front

What is the relationship between corresponding angles when two parallel lines are cut by a transversal?

Back

Corresponding angles are equal.

Front

If Angle 5 and Angle 6 are vertical angles, and Angle 5 measures 45 degrees, what is the measure of Angle 6?

Back

Angle 6 also measures 45 degrees.