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 in the same plane.

Front

Define corresponding angles.

Back

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

Front

What are alternate interior angles?

Back

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

Front

What are alternate exterior angles?

Back

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

Front

What are vertical angles?

Back

Angles that are opposite each other when two lines cross. They are always equal.

Front

What is the sum of supplementary angles?

Back

The sum of two angles that equals 180 degrees.

Front

What is the sum of complementary angles?

Back

The sum of two angles that equals 90 degrees.

Front

If angle 1 is 50 degrees, what is the measure of its supplementary angle?

Back

130 degrees.

Front

If angle 2 is 30 degrees, what is the measure of its complementary angle?

Back

60 degrees.