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Sagot :
The area of a circle is π (Pi) times the Radius squared, which is written:
A = π × r2
Or, when you know the Diameter:
A = (π/4) × D2
Or, when you know the Circumference:
A = C2 / 4π
Answer:
Area of a circle = Aπr²
*You multiply the area by pi and then by the square of the radius.
**If you are given the diameter instead of the area then just divide it by 2 and substitute it in the expression.
***If you are given the circumference then: A = C²/ 4π
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