Parallel Lines

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

Define alternate interior angles.

Back

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

Front

Define corresponding angles.

Back

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

Front

What are consecutive interior angles?

Back

Angles that are on the same side of the transversal and inside the two lines.

Front

What is the relationship between alternate exterior angles?

Back

They are equal when the lines are parallel.

Front

What is the sum of the measures of supplementary angles?

Back

180 degrees.

Front

If two lines are cut by a transversal and the alternate interior angles are equal, what can be concluded?

Back

The lines are parallel.

Front

What is the relationship between vertical angles?

Back

Vertical angles are always equal.

Front

If angle 1 and angle 2 are corresponding angles, what can be said about the lines they lie on?

Back

The lines are parallel if the angles are equal.