Parallel Lines Cut by a Transversal

Front

What are parallel lines?

Back

Parallel lines are lines in a plane that never meet and are always the same distance apart.

Front

What is a transversal?

Back

A transversal is a line that intersects two or more lines at different points.

Front

What are corresponding angles?

Back

Corresponding angles are angles that are in the same position on two parallel lines cut by a transversal.

Front

What are alternate interior angles?

Back

Alternate interior angles are angles that are on opposite sides of the transversal and inside the two parallel lines.

Front

What are alternate exterior angles?

Back

Alternate exterior angles are angles that are on opposite sides of the transversal and outside the two parallel lines.

Front

What are vertical angles?

Back

Vertical angles are the angles opposite each other when two lines intersect. They are always equal.

Front

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

Back

To find the measure of an angle formed by a transversal, use the relationships between corresponding, alternate interior, and alternate exterior angles.

Front

What is the sum of the angles on a straight line?

Back

The sum of the angles on a straight line is 180 degrees.

Front

What is the relationship between interior angles on the same side of the transversal?

Back

Interior angles on the same side of the transversal are supplementary, meaning they add up to 180 degrees.

Front

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

Back

If two parallel lines are cut by a transversal, the corresponding angles are equal.