If a dart board is divided into twenty equal sectors and the diameter of the board is 18 inches, what area of the board does each sector cover? If a dart board is divided into twenty equal sectors and the diameter of the board is 18 inches, what area of the board does each sector cover?   The dart board is a circle.

Expert Answers

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The circular dart board has a diameter of 18 inches. So, its radius is 18/2 = 9 inches.

Therefore its area is pi*r^2 = pi*9^2

This is divided into 20 equal sectors.

So the area of each sector is pi*81/20 = 12.72 square inch approximately.

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