Parallel Line Geometry

Front

What are parallel lines?

Back

Parallel lines are lines in a plane that never meet; they are always the same distance apart.

Front

What are alternate interior angles?

Back

Alternate interior angles are pairs of angles that are on opposite sides of a transversal and inside the two lines.

Front

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

Back

When two parallel lines are cut by a transversal, alternate interior angles are equal.

Front

What are alternate exterior angles?

Back

Alternate exterior angles are pairs of angles that are on opposite sides of a transversal and outside the two lines.

Front

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

Back

When two parallel lines are cut by a transversal, alternate exterior angles are equal.

Front

What are corresponding angles?

Back

Corresponding angles are pairs of angles that are on the same side of the transversal and in corresponding positions.

Front

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

Back

When two parallel lines are cut by a transversal, corresponding angles are equal.

Front

What is the sum of the interior angles on the same side of a transversal?

Back

The sum of the interior angles on the same side of a transversal is supplementary, meaning they add up to 180 degrees.

Front

If angle 1 is 110 degrees, what is the measure of angle 2 if angle 1 and angle 2 are corresponding angles?

Back

Angle 2 is also 110 degrees.

Front

If angle 1 is 110 degrees, what is the measure of angle 3 if angle 1 and angle 3 are alternate interior angles?

Back

Angle 3 is 70 degrees.