Parallel lines cut by a Transversal

Front

What are Vertical Angles?

Back

Vertical angles are the angles opposite each other when two lines cross. They are always equal in measure.

Front

If angle 6 is 25 degrees, what is the measure of angle 7?

Back

Angle 7 is 155 degrees.

Front

What are Alternate Interior Angles?

Back

Alternate interior angles are pairs of angles that lie between two parallel lines and on opposite sides of a transversal. They are equal in measure.

Front

Which angles are considered Alternate Exterior Angles?

Back

Alternate exterior angles are pairs of angles that lie outside two parallel lines and on opposite sides of a transversal. They are equal in measure.

Front

What is a Transversal?

Back

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

Front

If angle 2 is 70 degrees, what is the measure of angle 6?

Back

Angle 6 is also 70 degrees because they are corresponding angles.

Front

What is the relationship between Corresponding Angles?

Back

Corresponding angles are angles that are in the same position on two parallel lines in relation to a transversal. They are equal in measure.

Front

Identify the pair of angles that are Alternate Exterior Angles: Angle 7 and Angle 4, Angle 2 and Angle 6, Angle 8 and Angle 1, Angle 2 and Angle 8.

Back

Angle 8 and Angle 1 are alternate exterior angles.

Front

If angle 3 is 40 degrees, what is the measure of angle 5?

Back

Angle 5 is 140 degrees because they are supplementary angles.

Front

What are Supplementary Angles?

Back

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