Self Checking Math Lesson Plans & Worksheets Reviewed by Teachers 7-2 Self Check Pythagorean Theorem Multiple Choice For Students 8th - 10th Middle and high schoolers use the Pythagorean Theorem to determine the length of the sides of a right triangle. They solve distance problems. This one-page worksheet contains 10 multiple-choice problems. This is self-checking worksheet. + Lesson Planet: Curated OER