This worksheet will help you to know about Circle Calculation. It is used to find out the Circle's Total Area, Circumference and Diameter of the given radius value. The Circle is a plane curve everywhere equidistant from a given fixed point, the center. A line connecting any two points on a circle is called a chord, and a chord passing through the center is called a diameter. Radius of the circle is represented by R. R = D/2.
**Circle Area & Circumference formula**

Circle Area = π r2

Circle Circumference = 2 π r

Circle Diameter = 2 r

**For Example**

Radius of the circle is 5
**Circle Area** = π r2

= 3.14 x 5^2

= 78.57
**Circle Circumference** = 2 π r

= 2 x 3.14 x 5

= 31.4286
**Circle Diameter** = 2 r

= 2 x 5

= 10

When you try this calculation on your own, use this circle calculator to verify your answers.

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