This resource is a mini-flexbook created by Shana Friend and provided through Ck12.org.  https://goopenva.org/courses/the-pythagorean-formula-mini-flexbook/view

This resource gives guided instruction and practice on three topics- determining if a right triangle exists, finding the length of a leg, and finding the length of a hypotenuse.  

Once students are comfortable with the given content, they can practice what they learned by completing a Quizizz activity.  https://quizizz.com/admin/quiz/582b29fa24d84f36018128cd/g8b5-pythagorean-theorem