Parallel and Transversal Lines

Front

What are parallel lines?

Back

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

Front

What are transversal lines?

Back

A line that crosses at least two other lines in the same plane.

Front

What is the Corresponding Angles Postulate?

Back

When a transversal intersects two parallel lines, each pair of corresponding angles is equal.

Front

What is the Alternate Interior Angles Theorem?

Back

When a transversal intersects two parallel lines, each pair of alternate interior angles is equal.

Front

What is the Same-Side Interior Angles Theorem?

Back

When a transversal intersects two parallel lines, the same-side interior angles are supplementary (add up to 180 degrees).

Front

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

Back

The angles formed will have specific relationships: corresponding angles are equal, alternate interior angles are equal, and same-side interior angles are supplementary.

Front

Find the measure of angle A if angle B is 108 degrees and they are corresponding angles.

Back

Angle A = 108 degrees.

Front

Find the measure of angle C if angle D is 125 degrees and they are alternate interior angles.

Back

Angle C = 125 degrees.

Front

If angle E is 79 degrees and angle F is on the same side of the transversal, what is the measure of angle F?

Back

Angle F = 101 degrees (since they are supplementary).

Front

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

Back

The sum of the interior angles of a triangle is always 180 degrees.