Parallel Lines Cut by a Transversal

Front

What are supplementary angles?

Back

Angles that add up to 180°.

Front

What is the relationship of angles formed when two parallel lines are cut by a transversal?

Back

The angles can be classified as corresponding angles, alternate interior angles, alternate exterior angles, and vertical angles.

Front

Define corresponding angles.

Back

Angles that are in the same position on two parallel lines in relation to the transversal.

Front

What are alternate interior angles?

Back

Angles that are on opposite sides of the transversal and inside the two parallel lines.

Front

What are alternate exterior angles?

Back

Angles that are on opposite sides of the transversal and outside the two parallel lines.

Front

What are vertical angles?

Back

Angles that are opposite each other when two lines intersect; they are always equal.

Front

If ∠A and ∠B are supplementary, and ∠A = 70°, what is ∠B?

Back

∠B = 110°.

Front

If two parallel lines are cut by a transversal, what can be said about the corresponding angles?

Back

They are equal.

Front

Find m ∠D if ∠D and ∠C are alternate interior angles and ∠C = 116°.

Back

m ∠D = 116°.

Front

What is the sum of the measures of angles on a straight line?

Back

180°.