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the area of a circle is represented by the following equation; A=pi*R2 where A is area, pi is the number pi (3.1415926.......for most high school maths, 3.14 is suitable) and R is the radius. So, square your radius, and multiply it by pi.

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11y ago
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Q: What is the area of a circle with a radius 2.1 centimeters?
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