Parallel Lines and 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.

Front

What are alternate interior angles?

Back

Angles that lie between two lines and on opposite sides of a transversal.

Front

What are alternate exterior angles?

Back

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

Front

What are corresponding angles?

Back

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

Front

What are same-side interior angles?

Back

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

Front

What does it mean for angles to be supplementary?

Back

Two angles that add up to 180 degrees.

Front

What does it mean for angles to be complementary?

Back

Two angles that add up to 90 degrees.

Front

If angle 2 is 70 degrees, what is the measure of angle 4 if they are corresponding angles?

Back

Angle 4 is also 70 degrees.

Front

If angle 1 is 50 degrees, what is the measure of angle 3 if they are alternate interior angles?

Back

Angle 3 is also 50 degrees.