Converse of the Pythagorean Theorem: Is It a Right Triangle?

How can you tell if a triangle is a right triangle from only the side lengths? By using the converse of the Pythagorean theorem! In this  eighth-grade geometry worksheet, students will read descriptions of 10 different triangles. Then learners will need to plug the given side lengths into the formula a² + b² = c² to determine whether or not each triangle described is a right triangle. To go deeper with the Pythagorean theorem, have learners complete Proving the Pythagorean Theorem next!