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 exterior angles?

Back

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

Front

What are vertical angles?

Back

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

Front

If angle 6 is 25 degrees, what is angle 7?

Back

155 degrees (because they are supplementary angles).

Front

If angle 1 is 135 degrees, what is angle 3?

Back

135 degrees (because they are corresponding angles).

Front

What is the relationship between angle 2 and angle 6 if they are alternate interior angles?

Back

They are equal in measure.

Front

How do you find the measure of an angle when given its supplementary angle?

Back

Subtract the measure of the known angle from 180 degrees.