7.1 Parallel Lines and Angles

Front

What are parallel lines?

Back

Lines in a plane that never meet and are always the same distance apart.

Front

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

Back

180 degrees.

Front

What are complementary angles?

Back

Two angles that add up to 90 degrees.

Front

What are supplementary angles?

Back

Two angles that add up to 180 degrees.

Front

What are vertical angles?

Back

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

Front

What are adjacent angles?

Back

Angles that share a common side and a common vertex.

Front

If two angles are complementary and one angle is 35 degrees, what is the other angle?

Back

55 degrees.

Front

If two angles are supplementary and one angle is 80 degrees, what is the other angle?

Back

100 degrees.

Front

What is the relationship between parallel lines and transversals?

Back

A transversal intersects parallel lines, creating corresponding, alternate interior, and alternate exterior angles.

Front

What are corresponding angles?

Back

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