Parallel Lines Cut by a Transversal Vocab

Front

What are corresponding angles?

Back

Angles that are in the same position on two parallel lines cut by a transversal. They are equal in measure.

Front

What are vertical angles?

Back

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

Front

What are alternate interior angles?

Back

Angles that are on opposite sides of the transversal and inside the two parallel lines. They are equal in measure.

Front

What are consecutive interior angles?

Back

Angles that are on the same side of the transversal and inside the two parallel lines. They are supplementary (add up to 180°).

Front

What are alternate exterior angles?

Back

Angles that are on opposite sides of the transversal and outside the two parallel lines. They are equal in measure.

Front

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

Back

They are equal.

Front

If angle A and angle B are supplementary, what is the relationship between them?

Back

Their measures add up to 180°.

Front

Given two parallel lines cut by a transversal, if angle 3 is 70°, what is the measure of angle 6?

Back

Angle 6 is also 70° (corresponding angles).

Front

If angle 1 is 50°, what is the measure of angle 2 if they are vertical angles?

Back

Angle 2 is also 50°.

Front

What is the sum of the measures of consecutive interior angles?

Back

180°.