Eight problems set equal alternate interior angles or make same-side interior angles add to 180° to solve for x.
Click on the image to open the Angle Equations with Parallel Lines PDF. Print it to use the worksheet. The answer key is on page 2.
Angle Equations with Parallel Lines
Use this free 8th grade math worksheet from Teaching Squared. Find more in Geometry Worksheets and 8th Grade Math Worksheets.