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[a,b" and "c" are the sides of a right t...

[a,b" and "c" are the sides of a right triangle,where "c" is the hypotenuse.A circle,of nadius "r," is "],[" sides of the triangle.Prove that "quad r=(a+b-c)/(2)" ."],[" A "21m" deep well with diameter "6m" is dug and the earth from digging is event somed "]

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