Find the Error: Distance Between Two Points

Use this two-page error analysis worksheet to help students build confidence when using the Pythagorean theorem to find the distance between points on a coordinate plane. This eighth-grade geometry worksheet has four problems, each of which includes a graph with two points plotted and sample student work that features an error commonly made when using the Pythagorean theorem to calculate the distance between two points on a coordinate plane. For each problem, students are asked to circle the error in the work, explain what the error was, and then show the correct work. For an introduction to this skill, give students Find the Distance Between Two Points on the Coordinate Plane. And for additional practice, check out the Distance Between Two Points worksheet!