#help i djdnt even learn this

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lucid maple
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work out the area of the entire circle

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using the formula

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piR^2

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now

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work out the area of the blue circle

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blue + black area

image.png
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then subtract the white area

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so Pi7^2 - Pi4^2 = area of the blue

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(area of the blue/area of the entire circle) * 100