Multiple choice

If the radius of a circle is r cm, its area will be

  1. πr2 cm2

  2. π2r2 cm2

  3. π2r cm2

  4. None of these
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A Correct answer
Explanation

The standard formula for the area of a circle with radius r is pi * r^2.

AI explanation

The area of a circle is defined by the formula pi times the square of its radius. Substituting the radius variable r into this formula gives pi times r squared cm2.

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