Parallel Lines Cut by a Transversal

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

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.

Front

What are corresponding angles?

Back

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

Front

What are vertical angles?

Back

Angles that are opposite each other when two lines intersect; they are always congruent.

Front

If angle 3 is 127°, what is the measure of angle 5?

Back

Angle 5 is also 127° (Alternate Interior Angles are congruent).

Front

If angle 1 is 64°, what is the measure of angle 4?

Back

Angle 4 is also 64° (Corresponding Angles are congruent).

Front

What is the relationship between angle 2 and angle 3 if they are alternate interior angles?

Back

They are congruent; if angle 3 is 127°, then angle 2 is also 127°.

Front

If angle 6 is 52°, which angle is NOT congruent to it?

Back

Angle 5 (as it is an alternate interior angle with angle 3).