Angles formed by a Transversal

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 at least two other lines.

Front

What are corresponding angles?

Back

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

Front

What are alternate interior angles?

Back

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

Front

What are vertical angles?

Back

Angles that are opposite each other when two lines intersect.

Front

What does it mean for angles to be supplementary?

Back

Two angles that add up to 180 degrees.

Front

What does it mean for angles to be congruent?

Back

Angles that have the same measure.

Front

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

Back

They are congruent.

Front

If angle 3 is 75°, what is the measure of angle 6 if lines are parallel?

Back

Angle 6 is also 75° (corresponding angles).

Front

If angle 6 is 75°, what is the measure of angle 4 if lines are parallel?

Back

Angle 4 is 105° (alternate interior angles).