circle

Related Questions

• If the straight line $y=mx+c$ touches the circle ${{x}^{2}}+{{y}^{2}}-4y=0$ , then the value of c will be

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• The line $3x-2y=k$ meets the circle ${{x}^{2}}+{{y}^{2}}=4{{r}^{2}}$ at only one point, if ${{k}^{2}}$ =

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• Which of the following line is a diameter of the circle ${{x}^{2}}+{{y}^{2}}-6x-8y-9=0$

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• The equation of the tangent to the circle ${{x}^{2}}+{{y}^{2}}-2x-4y-4=0$ which is perpendicular to $3x-4y-1=0$ , is

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• If the lines $x+y=6$ and $x+2y=4$ be diameters of the circle whose diameter is 20, then the equation of the circle is

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