Angles & Parallel Lines with Transversals

Front

What must be true for Alternate Interior angles to be congruent?

Back

The transversal has to cut through two parallel lines.

Front

What is the relationship between angles that are complementary?

Back

Two angles are complementary if their measures add up to 90 degrees.

Front

What is the relationship between angles that are supplementary?

Back

Two angles are supplementary if their measures add up to 180 degrees.

Front

What are Alternate Interior angles?

Back

Angles on opposite sides of the transversal, each inside the parallel lines.

Front

What is the relationship between Angle 8 & 15 if they are on different parallel lines and on opposite sides of the transversal?

Back

There is no relationship.

Front

What are Corresponding angles?

Back

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

Front

What are Alternate Exterior angles?

Back

Angles on opposite sides of the transversal, each outside the parallel lines.

Front

What is the definition of Vertical angles?

Back

Angles that are opposite each other when two lines intersect.

Front

If two angles are neither complementary nor supplementary, what can we say about their measures?

Back

Their measures do not add up to 90 degrees or 180 degrees.

Front

What is the sum of the measures of complementary angles?

Back

90 degrees.