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

Define alternate exterior angles.

Back

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

Front

What are vertical angles?

Back

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

Front

Identify corresponding angles.

Back

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

Front

What is the relationship between alternate interior angles when two parallel lines are cut by a transversal?

Back

They are equal.

Front

If two parallel lines are cut by a transversal, what can be said about the sum of interior angles on the same side of the transversal?

Back

They are supplementary (add up to 180 degrees).

Front

How do you find the measure of an angle formed by a transversal?

Back

Use the properties of angles (corresponding, alternate interior, etc.) to set up equations.

Front

What is the measure of angle 8 if angle 5 is 70 degrees?

Back

Angle 8 is 70 degrees (alternate interior angles are equal).

Front

If angle 2 is 50 degrees, what is the measure of angle 6?

Back

Angle 6 is 130 degrees (supplementary to angle 2).