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14 August, 21:16

What is the area of a circle with a diameter of 21 centimeters?

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Answers (2)
  1. 14 August, 22:36
    0
    The area of a circle with a diameter of twenty-one is roughly 346 or 346.36 to be exact.

    - Divide the diameter by two to find the radius.

    - Square the radius & Multiply by Pi
  2. 15 August, 00:33
    0
    Area of a circle: πr²

    dа ta:

    diameter: 21 cm

    radius=diameter/2=21 cm/2=10.5 cm

    area of this circle: π (10.5 cm) ²=110.25π cm² (≈346.36 cm²)

    Answer: area=110.25π cm²
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