Angle Relationships with Parallel Lines and a Transversal

Front

What are Same-Side Exterior Angles?

Back

Angles that are on the same side of the transversal and outside the two parallel lines.

Front

What are Same-Side Interior Angles?

Back

Angles that are on the same side 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 congruent.

Front

What are Corresponding Angles?

Back

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

Front

What are Alternate Interior Angles?

Back

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

Front

What is the relationship between Supplementary Angles?

Back

Two angles that add up to 180 degrees.

Front

If ∠6 is 50 degrees, what is the measure of ∠2 if they are Same-Side Interior Angles?

Back

∠2 = 130 degrees (they are supplementary).

Front

If ∠1 and ∠3 are Corresponding Angles, and ∠1 is 70 degrees, what is ∠3?

Back

∠3 = 70 degrees (they are congruent).

Front

If ∠4 and ∠5 are Alternate Interior Angles, and ∠4 is 120 degrees, what is ∠5?

Back

∠5 = 120 degrees (they are congruent).