This worksheet includes 45 triangles that include x as either a side length or as part of an expression for a side length. Through the course of the worksheet students review simplifying roots, the properties of square roots, solving quadratics by taking the root, and solving quadratics by factoring. Among the problems special triangle are well represented, preparing students for future discussions. Full solutions are included. The binomial problems produce quadratics that can be solved by factoring. Originally written for Geometry, but may be appropriate for an Algebra 1 or 2 class.