Parallel Lines and Congruent Angles

Front

What is a transversal?

Back

A line that intersects at least two other lines.

Front

What are vertical angles?

Back

Angles that are opposite of each other when lines intersect.

Front

What are supplementary angles?

Back

Angles that add up to 180°.

Front

What are congruent angles?

Back

Angles that have the same measure.

Front

What is the relationship between parallel lines and transversals?

Back

When a transversal intersects parallel lines, it creates corresponding angles that are equal.

Front

What are corresponding angles?

Back

Angles that are in the same position on different parallel lines when cut by a transversal.

Front

What are alternate interior angles?

Back

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

Front

What are alternate exterior angles?

Back

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

Front

If two angles are supplementary and one angle measures 70°, what is the measure of the other angle?

Back

110°.

Front

If two angles are vertical angles and one angle measures 45°, what is the measure of the other angle?

Back

45°.