Parallel Lines

Front

What are parallel lines?

Back

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

Front

What are corresponding angles?

Back

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

Front

What is the Corresponding Angles Postulate?

Back

If two parallel lines are cut by a transversal, then each pair of corresponding angles is equal.

Front

What are alternate interior angles?

Back

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

Front

What is the Alternate Interior Angles Theorem?

Back

If two parallel lines are cut by a transversal, then each pair of alternate interior angles is equal.

Front

What are consecutive interior angles?

Back

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

Front

What is the Consecutive Interior Angles Theorem?

Back

If two parallel lines are cut by a transversal, then each pair of consecutive interior angles is supplementary.

Front

What are alternate exterior angles?

Back

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

Front

What is the Alternate Exterior Angles Theorem?

Back

If two parallel lines are cut by a transversal, then each pair of alternate exterior angles is equal.

Front

What is a transversal?

Back

A line that intersects two or more lines in a plane.