Eight problems use the exterior angle theorem, that an exterior angle equals the sum of the two remote interior angles, including some with algebra.
Click on the image to open the Exterior Angles of Triangles PDF. Print it to use the worksheet. The answer key is on page 2.
Exterior Angles of Triangles
Use this free 8th grade math worksheet from Teaching Squared. Find more in Geometry Worksheets and 8th Grade Math Worksheets.