How to Find the Area of Rectangles Using Algebraic Expressions

Written by marcy reed
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How to Find the Area of Rectangles Using Algebraic Expressions
Use a ruler to measure the length and width of the rectangle. (Zedcor Wholly Owned/PhotoObjects.net/Getty Images)

Finding the area of a rectangle is an important ability that allows you to do things from completing geometry homework to planning home improvement projects. The area of a rectangle is the amount of space that a rectangle covers. You can find the area of a rectangle using a simple algebraic expression in which "L" x "W" = "X," with X as your variable, or answer.

Skill level:
Moderately Easy

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Things you need

  • Ruler or tape measure

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Instructions

  1. 1

    Measure the length of your rectangle. Use this measurement as L.

  2. 2

    Measure the width of your rectangle. This measurement is W.

  3. 3

    Set up your algebraic expression: L times W = X, or the area.

  4. 4

    Solve your equation by multiplying L times W to find the area.

Tips and warnings

  • Use a calculator as necessary.

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