Parallel Lines & Transversals

Front

What are parallel lines?

Back

Lines in a plane that never meet and are always the same distance apart.

Front

What is a transversal?

Back

A line that crosses at least two other lines in the same plane.

Front

Define alternate exterior angles.

Back

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

Front

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

Back

They are equal.

Front

Define corresponding angles.

Back

Angles that are in the same position on two different lines cut by a transversal.

Front

What is the relationship between corresponding angles when lines are parallel?

Back

They are equal.

Front

Define consecutive interior angles.

Back

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

Front

What is the relationship between consecutive interior angles when lines are parallel?

Back

They are supplementary (add up to 180 degrees).

Front

If angle 2 is 75 degrees, what is the measure of angle 8 if lines are parallel?

Back

Angle 8 is also 75 degrees (alternate exterior angles).

Front

If angle 1 is 60 degrees, what is the measure of angle 3 if lines are parallel?

Back

Angle 3 is also 60 degrees (corresponding angles).