How Do You Find the Radius of a Circle if You Know the Area?

How Do You Find the Radius of a Circle if You Know the Area?

Note:

Want to find the radius of a circle? Already have the area? Then you can use the formula for the area of a circle to solve! This tutorial shows you how to use that formula and the given value for the area to find the radius. Take a look!

Keywords:

  • solve for radius
  • area
  • unknown radius
  • known area
  • circle
  • reverse order of operations

Background Tutorials

  • Evaluating Expressions

      • What is a Variable?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!

      • What's the Order of Operations?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!

  • Areas of Circles and Sectors

      • What is the Formula for the Area of a Circle?What is the Formula for the Area of a Circle?

      What is the Formula for the Area of a Circle?

      Did you know that you can figure out the formula for the area of a circle by first turning the circle into a parallelogram? It seems a little weird, but it really works! Watch this tutorial to see how it's done!

Further Exploration