Angles and parallel lines

Corresponding angles are pairs of angles that are in the same position on two parallel lines cut by a transversal. They are equal in measure.

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

Angle 7 is 155 degrees.

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

The angles formed have specific relationships: corresponding angles are equal, alternate interior angles are equal, and consecutive interior angles are supplementary.

Angle 5 is equal to its corresponding angle, which is angle 1.

To find the measure of an angle that is supplementary to another, subtract the measure of the known angle from 180 degrees.

Consecutive interior angles are pairs of angles that are on the same side of the transversal and inside the two parallel lines. They are supplementary, meaning their measures add up to 180 degrees.

The supplementary angle to angle C is 64 degrees.

A transversal is a line that intersects two or more lines at different points.