circle

Related Questions

• The line $y=mx+c$ will be a normal to the circle with radius r and centre at (a, b), if

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• The equation of the circle of radius 5 and touching the coordinate axes in third quadrant is

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• The equation of director circle of the circle ${{x}^{2}}+{{y}^{2}}={{a}^{2}},$ is

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• The locus of the middle points of those chords of the circle ${{x}^{2}}+{{y}^{2}}=4$ which subtend a right angle at the origin is

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• If the circles ${{x}^{2}}+{{y}^{2}}-9=0$ and ${{x}^{2}}+{{y}^{2}}+2ax+2y+1=0$ touch each other, then $a =$

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