Unit 3 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.

Front

What are alternate interior angles?

Back

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

Front

What are corresponding angles?

Back

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

Front

What is the sum of the interior angles of a triangle?

Back

180 degrees.

Front

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

Back

They are equal.

Front

If ∠1 = 82°, what is the measure of ∠5 if lines are parallel?

Back

∠5 = 82° (corresponding angles).

Front

If ∠D = 64°, what is the measure of the angle on the same side of the transversal?

Back

The angle is 116° (consecutive interior angles are supplementary).

Front

What is the relationship between interior angles on the same side of the transversal?

Back

They are supplementary (add up to 180°).

Front

If ∠B = 82°, what is the measure of ∠3 if lines are parallel?

Back

∠3 = 98° (same-side interior angles are supplementary).