Parallel Lines Cut by a Transversal

Front

What is a transversal in geometry?

Back

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

Front

What are vertical angles?

Back

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

Front

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

Back

Alternate interior angles are equal.

Front

Define supplementary angles.

Back

Supplementary angles are two angles whose measures add up to 180 degrees.

Front

What is the measure of angle C if it is given as 116°?

Back

m∠C = 116°.

Front

What are corresponding angles?

Back

Corresponding angles are the angles that are in the same position at each intersection where a transversal crosses two lines.

Front

What is the relationship of corresponding angles when two parallel lines are cut by a transversal?

Back

Corresponding angles are equal.

Front

What are alternate exterior angles?

Back

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

Front

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

Back

Alternate exterior angles are equal.

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.