Parallel Lines cut by a Transversal

Front

What are Vertical Angles?

Back

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

Front

What are Alternate Interior Angles?

Back

Alternate interior angles are pairs of angles on opposite sides of the transversal but inside the two lines. They are equal when the lines are parallel.

Front

What are Corresponding Angles?

Back

Corresponding angles are pairs of angles that are in the same position on two different lines cut by a transversal. They are equal when the lines are parallel.

Front

What are Alternate Exterior Angles?

Back

Alternate exterior angles are pairs of angles on opposite sides of the transversal but outside the two lines. They are equal when the lines are parallel.

Front

If two parallel lines are cut by a transversal, what can be said about the angles formed?

Back

The angles formed have specific relationships: corresponding angles are equal, alternate interior angles are equal, and alternate exterior angles are equal.

Front

Find the value of ∠D if ∠D and ∠C are vertical angles and ∠C = 116°.

Back

∠D = 116°.

Front

If ∠1 = 64°, what is the measure of its corresponding angle?

Back

The measure of the corresponding angle is also 64°.

Front

What is the relationship between angles 2 and 8 if they are Alternate Exterior Angles?

Back

If angles 2 and 8 are alternate exterior angles, they are equal when the lines are parallel.

Front

If two angles are supplementary, what is the sum of their measures?

Back

The sum of supplementary angles is 180°.

Front

What is the measure of angle 3 if angle 3 and angle 4 are corresponding angles and angle 4 = 80°?

Back

Angle 3 = 80°.