Find the area of equilateral triangle in...

Find the area of equilateral triangle inscribed in a circle `x^2+y^2+2gx+2fy+c=0`

A

`( 3)/( 4) ( g^(2) +f^(2)- c)`

B

`( sqrt( 3))/( 4) ( g^(2) + f^(2) - c )`

C

`( 3 sqrt( 3))/( 4) ( g^(2) +f^(2) - c)`

D

`( 1)/( 4) ( g^(2) + f^(2) - c) `

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The correct Answer is:

c

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