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Mathematics

If d is the diameter of a circle, then its area is

  1. πd2

  2. πd22\dfrac{πd^2}{2}

  3. πd24\dfrac{πd^2}{4}

  4. 2πd2

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Answer

r = Diameter2=d2\dfrac{\text{Diameter}}{2} = \dfrac{d}{2}.

By formula,

Area of circle = πr2 = π×(d2)2=πd24.π \times \Big(\dfrac{d}{2}\Big)^2 = \dfrac{πd^2}{4}.

Hence, Option 3 is the correct option.

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