If OA and OB are the tangents form the origin to the circle \[{{x}^{2}}+{{y}^{2}}+2gx+2fy+c=0\] and C is the centre of the circle, the area of the quadrilateral OACD is

\[c\sqrt{{{g}^{2}}+{{f}^{2}}-c}\]

\[\frac{1}{2}\sqrt{c({{g}^{2}}+{{f}^{2}}-c)}\]

\[\sqrt{c({{g}^{2}}+{{f}^{2}}-c)}\]

\[\frac{\sqrt{{{g}^{2}}+{{f}^{2}}-c}}{c}\]

If OA and OB are the tangents form the origin to the circle \[{{x}^{2}

1.	If OA and OB are the tangents form the origin to the circle \[{{x}^{2}}+{{y}^{2}}+2gx+2fy+c=0\] and C is the centre of the circle, the area of the quadrilateral OACD is
A.	\[\frac{1}{2}\sqrt{c({{g}^{2}}+{{f}^{2}}-c)}\]
B.	\[\sqrt{c({{g}^{2}}+{{f}^{2}}-c)}\]
C.	\[c\sqrt{{{g}^{2}}+{{f}^{2}}-c}\]
D.	\[\frac{\sqrt{{{g}^{2}}+{{f}^{2}}-c}}{c}\]
Answer» C. \[c\sqrt{{{g}^{2}}+{{f}^{2}}-c}\]

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If OA and OB are the tangents form the origin to the circle \[{{x}^{2}}+{{y}^{2}}+2gx+2fy+c=0\] and C is the centre of the circle, the area of the quadrilateral OACD is

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