Center, Radius, and Diameter

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

When you know the radius of a circle, you can find the diameter of that circle with a simple multiplication problem! Follow along with this tutorial to learn how to find the diameter of a circle when you're given the radius.
What is a Circle?

Circles are a fundamental part of math! In this tutorial, you'll be introduced to circles and see the different parts of a circle such as the diameter, radius, and chord. Check out this tutorial to learn about circles!