Parallel Lines and Transversals

Front

What are parallel lines?

Back

Parallel lines are lines in a plane that never meet. They are always the same distance apart and have the same slope.

Front

What is a transversal?

Back

A transversal is a line that crosses at least two other lines. When it intersects parallel lines, it creates several angles.

Front

What are corresponding angles?

Back

Corresponding angles are pairs of angles that are in similar positions at each intersection where a transversal crosses two lines.

Front

What are alternate interior angles?

Back

Alternate interior angles are pairs of angles that lie between two lines and on opposite sides of a transversal.

Front

What are alternate exterior angles?

Back

Alternate exterior angles are pairs of angles that lie outside two lines and on opposite sides of a transversal.

Front

What are consecutive interior angles?

Back

Consecutive interior angles are pairs of angles that lie between two lines on the same side of a transversal.

Front

If two parallel lines are cut by a transversal, what can be said about corresponding angles?

Back

Corresponding angles are congruent (equal in measure).

Front

If angle P measures 60 degrees, what is the measure of angle C if they are supplementary?

Back

Angle C measures 120 degrees.

Front

If angle C and angle P are supplementary, what is the relationship between their measures?

Back

The sum of angle C and angle P is 180 degrees.

Front

What is the measure of angle 8 if it is an alternate interior angle to a 135-degree angle?

Back

Angle 8 measures 135 degrees.