3.1 Parallel lines cut by a transversal

Front

What is a transversal?

Back

A line that passes through two or more parallel lines.

Front

What are alternate interior angles?

Back

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

Front

What are corresponding angles?

Back

Angles that are in the same position on two parallel lines in relation to the transversal.

Front

What are vertical angles?

Back

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

Front

What is the relationship between angle pairs formed by a transversal and parallel lines?

Back

Certain angle pairs are congruent or supplementary depending on their positions.

Front

What are alternate exterior angles?

Back

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

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 same side interior angles?

Back

They are supplementary (add up to 180 degrees).

Front

What is the relationship between angle 5 and angle 3 if they are corresponding angles?

Back

They are congruent (equal in measure).

Front

If angle 1 is 70 degrees, what is the measure of angle 5 if they are corresponding angles?

Back

Angle 5 is also 70 degrees.