Unit 3 Parallel Lines and Transversals

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 same-side interior angles?

Back

Angles that are on the same side of the transversal and inside the two parallel lines. They are supplementary.

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

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

Back

They are congruent (equal in measure).

Front

If two parallel lines are cut by a transversal, what can be said about the same-side interior angles?

Back

They are supplementary (their measures add up to 180°).

Front

If angle 1 is 50°, what is the measure of angle 5 if lines are parallel?

Back

Angle 5 is also 50° (corresponding angles).

Front

If angle 4 is 70°, what is the measure of angle 6 if lines are parallel?

Back

Angle 6 is 110° (same-side interior angles are supplementary).

Front

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

Back

They are congruent (equal in measure).

Front

If angle 2 is 120°, what is the measure of angle 8 if lines are parallel?

Back

Angle 8 is also 120° (corresponding angles).

Front

What is the sum of the measures of same-side interior angles?

Back

180° (they are supplementary).