Parallel Lines Cut by Transversal

Front

What are vertical angles?

Back

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

Front

If lines are parallel, what can be said about alternate interior angles?

Back

If lines are parallel, then alternate interior angles are congruent.

Front

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

Back

Corresponding angles are congruent when two parallel lines are cut by a transversal.

Front

Define alternate exterior angles.

Back

Alternate exterior angles are the pairs of angles that lie outside the two lines and on opposite sides of the transversal. They are congruent if the lines are parallel.

Front

What are supplementary angles?

Back

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

Front

What are complementary angles?

Back

Complementary angles are two angles whose measures add up to 90 degrees.

Front

What is the angle relationship when two parallel lines are cut by a transversal and the angles are on the same side of the transversal?

Back

The angles on the same side of the transversal are called consecutive interior angles and they are supplementary.

Front

If angle 1 is 37 degrees, what is the measure of its alternate interior angle?

Back

The measure of the alternate interior angle is also 37 degrees.

Front

What is the relationship between vertical angles?

Back

Vertical angles are always equal in measure.

Front

If two angles are supplementary and one angle measures 143 degrees, what is the measure of the other angle?

Back

The measure of the other angle is 37 degrees.