Area = pi*52 = 78.539 square cm to 3 dp
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The area of a circle whose diameter is 10 cm is: 78.54 cm2
A circle with a radius of 10 cm has an area of 314.16 square cm
The area of a circle with a diameter of two cm is about 3.1416 cm.
The diameter of a circle with an area of 86.54625 cm2 is: 10.49734 cm
The area of a circle with a diameter of 20 cm is: 314.2 cm2