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 intersects two or more lines at different points.

Front

What are 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 lie between two parallel lines on opposite sides of a transversal.

Front

What are alternate exterior angles?

Back

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

Front

What are same-side interior angles?

Back

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

Front

If angle 2 is 70 degrees, what is the measure of angle 6 if lines are parallel?

Back

Angle 6 is 110 degrees (supplementary to angle 2).

Front

If angle 1 is 50 degrees, what is the measure of angle 5 if lines are parallel?

Back

Angle 5 is also 50 degrees (corresponding angles).

Front

What is the relationship between supplementary angles?

Back

Two angles that add up to 180 degrees.

Front

What is the relationship between vertical angles?

Back

Vertical angles are equal in measure.