Find the area of a circle whose radius is 8 cm.

Let’s calculate the area of a circle if the radius is known, which is 8 cm.

And so the area is found by the formula S = п R 2, where п is a constant equal to 3, 1; R is the radius.

Substitute in the formula and get.

S = 3.1 * 8 2.

S = 3.1 * 64.

S = 198.4 cm 2.

Answer: the area of the circle is 198.4 cm 2.

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