Front

What are corresponding angles?

Back

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

Front

Identify the relationship between alternate interior angles.

Back

They are equal when two parallel lines are cut by a transversal.

Front

What are alternate exterior angles?

Back

Angles that lie outside the parallel lines and on opposite sides of the transversal.

Front

Define vertical angles.

Back

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

Front

What is the relationship between parallel lines and angles formed by a transversal?

Back

When a transversal crosses parallel lines, corresponding angles are equal, alternate interior angles are equal, and alternate exterior angles are equal.

Front

If two lines are perpendicular, what is the relationship between their slopes?

Back

The product of their slopes is -1.

Front

What does it mean for two lines to be parallel?

Back

They never intersect and have the same slope.

Front

What is the sum of the interior angles of a triangle?

Back

180 degrees.

Front

How do you find the measure of an angle if you know its corresponding angle?

Back

The measure of the corresponding angle is equal to the measure of the angle.

Front

What is the measure of angle 8 if angle 4 is 45 degrees?

Back

Angle 8 is 135 degrees (since they are corresponding angles).