Angle Relationships with Parallel Lines and a 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 Corresponding Angles?

Back

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

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 Same-Side Exterior Angles?

Back

Angles that are on the same side of the transversal and outside 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

What is the relationship between Supplementary Angles?

Back

Two angles that add up to 180 degrees.

Front

What is the relationship between Complementary Angles?

Back

Two angles that add up to 90 degrees.

Front

If ∠1 and ∠3 are Supplementary Angles, what is the sum of their measures?

Back

180 degrees.

Front

If ∠1 and ∠5 are Corresponding Angles, what can be said about their measures?

Back

They are equal.