Parallel Lines and Transversals (with Algebra)

Front

What are parallel lines?

Back

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

Front

What is a transversal?

Back

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

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 interior angles?

Back

Angles that are on opposite sides of the transversal and inside the two lines.

Front

What are supplementary angles?

Back

Two angles that add up to 180°.

Front

What are vertical angles?

Back

Angles that are opposite each other when two lines intersect.

Front

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

Back

They are equal.

Front

If angle 6 is 25 degrees, what is angle 7 if they are supplementary?

Back

Angle 7 is 155 degrees.

Front

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

Back

180 degrees.

Front

If angle A and angle B are complementary, what is the relationship between them?

Back

They add up to 90°.