This worksheet is a great way to have students practice using Pythagorean Theorem as well as incorporating some critical thinking skills. Students will start with the triangle at the bottom of the pile, and work there way through the triangles with the end goal of finding a side length of the triangle at the top. Students will have to decide what information they need to find, and how they can use that information to solve the next triangle in the sequence. All the sides of the triangle are Pythagorean Triples, so students don't have to worry about decimals in this activity. An answer key is included as well!