## Area of a circle (video)

This tool will calculate the diameter of a circle from the radius, and will convert different measurement units for radius and diameter. Formula. The formula used to calculate circle diameter is: ø = 2 · r. Symbols. ø = Circle diameter; r = Circle

## Circle Formulas For Diameter, Area and Circumference With Examples

Let us consider the different cases of the Diameter Formula. We can find the diameter of a circle when the radius, area, or circumference is known. Diameter Formula Using Radius of a Circle. Formula 1: The diameter is twice the length

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## How to Find Area from Diameter

The radius is the distance from the center of the circle to its edge. [1] Example If the radius of the circle is 4 cm, then the diameter of the circle is 4 cm x 2, or 8 cm. 2 If you know the circumference of the circle

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To figure out this mathematic question, you need to use the order of operations.

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## How to Find Diameter and Radius of Circle

Radius and Diameter: r = d/2 d = 2r Area of a circle: A = π r 2 = π d 2 /4 Circumference of a circle: C = 2 π r = π d. Circle Calculations: Using the formulas above and additional formulas you can calculate properties of a given circle

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One plus one is two.