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How Do You Find the Width of a Rectangle if You Know its Length and Perimeter?

Note:

Trying to figure out a missing side length of a rectangle? Got the perimeter and the other side length? Then you can use that information and the formula for the perimeter of a rectangle to find that missing length! This tutorial will show you how!

Keywords:

  • known length
  • known perimeter
  • solve width
  • rectangle
  • width unknown
  • unknown width
  • perimeter
  • rectangle perimeter

Background Tutorials

  • Perimeter

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        How Do You Find the Perimeter of a Shape?

      How Do You Find the Perimeter of a Shape?

      Ever had someone come up to you on the street, hand you a shape, and ask you to find the perimeter of that shape? Watch this tutorial, and next time that happens you'll be ready!

  • Evaluating Expressions

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        How Do You Evaluate an Algebraic Expression?

      How Do You Evaluate an Algebraic Expression?

      Plugging variables into an expression is essential for solving many algebra problems. See how to plug in variable values by watching this tutorial.

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        What is a Variable?

      What is a Variable?

      You can't do algebra without working with variables, but variables can be confusing. If you've ever wondered what variables are, then this tutorial is for you!

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        What's the Order of Operations?

      What's the Order of Operations?

      Check out this tutorial where you'll see exactly what order you need to follow when you simplify expressions. You'll also see what happens when you don't follow these rules, and you'll find out why order of operations is so important!

Further Exploration