Parallel Lines Cut by Transversals

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 crosses two or more other lines in the same plane.

Front

What are alternate interior angles?

Back

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

Front

What are corresponding angles?

Back

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

Front

What are same side interior angles?

Back

Angles that are on the same side of the transversal and inside the two lines.

Front

What is the relationship between alternate interior angles when lines are parallel?

Back

They are equal.

Front

What is the relationship between corresponding angles when lines are parallel?

Back

They are equal.

Front

What is the relationship between same side interior angles when lines are parallel?

Back

They are supplementary (add up to 180 degrees).

Front

If angle 3 is 49°, what is the measure of angle 5 if lines are parallel?

Back

Angle 5 is also 49° (alternate interior angles).

Front

If angle 1 and angle 2 are same side interior angles and angle 1 is 49°, what is the measure of angle 2?

Back

Angle 2 is 131° (supplementary angles).