Parallel lines and transversals

Front

What are Corresponding Angles?

Back

Angles that are in the same position on two parallel lines cut by a transversal. They are equal in measure.

Front

What are Alternate Interior Angles?

Back

Angles that are on opposite sides of the transversal and inside the two parallel lines. They are equal in measure.

Front

What are Consecutive Interior Angles?

Back

Angles that are on the same side of the transversal and inside the two parallel lines. They are supplementary (add up to 180°).

Front

What are Alternate Exterior Angles?

Back

Angles that are on opposite sides of the transversal and outside the two parallel lines. They are equal in measure.

Front

What are Vertical Angles?

Back

Angles that are opposite each other when two lines intersect. They are equal in measure.

Front

What does it mean for angles to be Supplementary?

Back

Two angles that add up to 180°.

Front

What does it mean for angles to be Congruent?

Back

Two angles that have the same measure.

Front

If ∠A = 82°, what is the measure of its Supplementary Angle?

Back

∠A's Supplementary Angle = 180° - 82° = 98°.

Front

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

Back

They are equal in measure.

Front

If ∠C and ∠P are Consecutive Interior Angles, what can be said about their measures?

Back

They are supplementary, meaning they add up to 180°.