Anonymous

# can someone help me with these two questions?

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- Anonymous1 month ago
First find the area of the whole circle.

A = (pi) (r squared)

Divide by 8 to find the area of each sector.

Multiply by 3 to find the area of the dark-shaded portion of the circle.

Subtract the dark-shaded area from the total circle area to find the area of the light-shaded portion.

The two methods of calculating the total area should be close but not necessarily identical, since some rounding-off is always involved with the use of pi.

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- MichaelLv 71 month ago
Area of entire circle

a = πr²

a =π(23²)

a ≈ 1,661.9cm²

Area of 3 dark shaded sectors

a = (3/8) of the circle area

a = (3/8) * 1,661.9

a ≈ 623.2cm²

Area of 5 light sectors

a = (5/8) of the circle area

a = (5/8) * 1,661.9

a ≈ 1,038.7cm²

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