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Area of a Circle from Diameter in Metres

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Calculate the area of a circle from a diameter measured in metres with results in square metres, hectares and acres.

Area of a circle in square metres = (Diam ÷ 2)² * 3.14159

Example:

Circle with a diameter of 30 metres
30 ÷ 2 = 15 * 15 * 3.14159 = 706.858 square metres

Area of a Circle

Diameter of Circle m
Decimal Rounding (# of digits in result) #

Results:

Area in Square Metres
Area in Hectares ha
Area in Acres ac

Calculation

  1. the circle's diameter measured in metres

Result

  1. area of circle in square metres
  2. area of circle in hectares
  3. area of circle in acres


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