Parallel Lines and transversals

Front

What are parallel lines?

Back

Parallel lines are lines in a plane that never meet. They are always the same distance apart and have the same slope.

Front

What is a transversal?

Back

A transversal is a line that crosses at least two other lines. When it intersects parallel lines, it creates several angles.

Front

What are corresponding angles?

Back

Corresponding angles are pairs of angles that are in similar positions at each intersection where a transversal crosses parallel lines. They are equal in measure.

Front

What are alternate interior angles?

Back

Alternate interior angles are pairs of angles that lie between the two lines and on opposite sides of the transversal. They are equal in measure.

Front

What are same-side interior angles?

Back

Same-side interior angles are pairs of angles that lie between the two lines and on the same side of the transversal. They are supplementary, meaning they add up to 180 degrees.

Front

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

Back

The corresponding angles are equal.

Front

If angle 1 is 70 degrees, what is the measure of angle 2 if angle 1 and angle 2 are corresponding angles?

Back

Angle 2 is also 70 degrees.

Front

What is the relationship between alternate exterior angles when two parallel lines are cut by a transversal?

Back

Alternate exterior angles are equal.

Front

If angle 3 is 45 degrees, what is the measure of angle 4 if angle 3 and angle 4 are same-side interior angles?

Back

Angle 4 is 135 degrees.

Front

What is the sum of the measures of same-side interior angles?

Back

The sum of the measures of same-side interior angles is 180 degrees.