# Using A&P Formulas to Solve for Dimensions

# Working Backwards

Your algebra skills meet your geometry skills when you use area and perimeter formulas to solve for missing dimensions.

## LEARN IT

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.

## PRACTICE IT

Straightforward formula sheet application problems that result in one-step equations.

Two and Three Step formula problems and circle application problems.

Multi-Step formula and application problems.

## WORKED EXAMPLES

MathABILITY- Solve for Width

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