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Area of a Sector of a Circle

Four equal ci...

Question

Four equal circles each of radius a ,touch each other show that the area between them is 6/7asquare

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Solution

Each circle touch with 2circles
to forming squre side 2a
area of squre is 4aa
when we see 4quardents in4 corner of squareand we have to find area between=4aa-490/36022/7*aa=6aa/7

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