# How to find the area of a circle with the diameter

Area Of A Circle Formula If you know the radius, r r, in whatever measurement units (mm, cm, m, inches, feet, and so on), use the formula π r 2 to find area, A A: A = πr2 A = π r 2 The answer will be square units of the linear units, such as

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## 4 Ways to Calculate the Area of a Circle

Area of a circle = π * r 2. Area of a circle diameter. The diameter of a circle calculator uses the following equation: Area of a circle = π * (d/2) 2. Where: π is approximately
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## Area of a circle (video)

Area of Circle given diameter is the amount of 2D space or region enclosed by a circle inside it's perimeter, calculated using the diameter of the Circle and is represented as A = (pi/4)* (D^2) or

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## What is the formula of area of circle when diameter is given?

This tool will calculate the area of a circle from the diameter, and will convert different measurement units for diameter and area. Formula The formula used to calculate circle area is: A = π x (ø/2) 2 Symbols A = Circle area π = Pi =

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## Area of a Circle Calculator

A circle of radius = 15 or diameter = 30 or circumference = 94.25 inches has an area of: 4.56064E-7 square kilometers (km²) 0.456064 square meters (m²) 4560.64 square centimeters (cm²)

## How to Find Area from Diameter

A circle of radius = 5 or diameter = 10 or circumference = 31.42 inches has an area of: 5.06709 × 10 -8 square kilometers (km²) 0.0506709 square meters (m²) 506.709 square centimeters