Prerequisite: You may want to review perfect squares before completing this lesson.

Have you been given the area or perimeter of a 2-dimensional shape and been asked to find a missing dimension like a length, width, height, base, or radius? Simply chose the correct formula from the GED formula sheet, substitute in the known values, and solve for the missing dimension using your algebra skills learned in Unit 1.

Watch the Virtual GED Class video below for a complete explanation and tons of worked example problems.