How Do You Find The Radius Of A Circle If You Know The Area?

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Real math help. 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?
  
  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?
  
  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?
  
  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

Circumference
- How Do You Find the Circumference of a Circle if You Know the Diameter?
  
  Trying to find the circumference of a circle? Know the diameter? Then you can use the formula for the circumference of a circle to get the answer! Just plug the value for the diameter into the formula and solve. This tutorial shows you how!
Areas of Circles and Sectors
- How Do You Find the Area of a Circle if You Know the Radius?
  
  If you know the radius of a circle, you can use it to find the area of that circle. Just plug that value into the formula for the area of a circle and solve. Watch this tutorial to see how it's done!
- How Do You Find the Area of a Circle if You Know the Diameter?
  
  If you have the diameter of a circle, you can use it to find the area of that circle. Just plug that value into the formula for the area of a circle and solve. Watch this tutorial to see how it's done!