Parallel Lines Cut by a Transversal

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

Define corresponding angles.

Back

Angles that are in the same position at each intersection where a transversal crosses two lines.

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 are alternate interior angles?

Back

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

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 two parallel lines are cut by a transversal, what can be said about the same side interior angles?

Back

They are supplementary (add up to 180 degrees).

Front

If angle 2 is 70 degrees, what is the measure of angle 7 if lines are parallel?

Back

Angle 7 is also 70 degrees (corresponding angles).

Front

If angle 4 is 110 degrees, what is the measure of angle 5 if lines are parallel?

Back

Angle 5 is 70 degrees (same side interior angles are supplementary).