###### Asked in School SubjectsMath and ArithmeticAlgebraGeometry

School Subjects

Math and Arithmetic

Algebra

Geometry

# How do you find the area of a circle if you have the diameter?

## Answer

###### Wiki User

###### June 09, 2013 6:50PM

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## Related Questions

###### Asked in Math and Arithmetic, Algebra, Geometry

### How do you find a area with the diameter of a circle?

Area = Pi(radius)squared.
You only need the radius of a circle to find the area.
To find the radius, when you have the diameter, divide the
diameter by 2, because the diameter forms two radii.
After you have found the radius, plug in the radius into the
area equation:
Area = Pi(radius)squared
In other words, you can say the other equation for the area of a
circle is:
Area = Pi(1/2Diameter)squared

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