12/20 Parallel lines and angles

Front

What are parallel lines?

Back

Lines that never intersect and are always the same distance apart.

Front

What is a transversal?

Back

A line that crosses two or more other lines.

Front

What are corresponding angles?

Back

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

Front

What does it mean for angles to be congruent?

Back

Angles that have the same measure.

Front

What are supplementary angles?

Back

Two angles that add up to 180 degrees.

Front

What is the sum of angles on a straight line?

Back

180 degrees.

Front

What is the sum of angles in a triangle?

Back

180 degrees.

Front

If two angles are complementary, what is their sum?

Back

90 degrees.

Front

What are alternate interior angles?

Back

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

Front

What are alternate exterior angles?

Back

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