circle

Related Questions

• The circle ${{x}^{2}}+{{y}^{2}}-8x+4y+4=0$ touches

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• A line $lx+my+n=0$ meets the circle ${{x}^{2}}+{{y}^{2}}={{a}^{2}}$ at the points P and Q. The tangents drawn at the points P and Q meet at R, then the coordinates of R is

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• Equations to the circles which touch the lines $3x-4y+1=0$ , $4x+3y-7=0$ and pass through (2, 3) are

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• Let $P({{x}_{1}},{{y}_{1}})$ and $Q({{x}_{2}},{{y}_{2}})$ are two points such that their abscissa ${{x}_{1}}$ and ${{x}_{2}}$ are the roots of the equation ${{x}^{2}}+2x-3=0$ while the ordinates ${{y}_{1}}$ and ${{y}_{2}}$ are the roots of the equation ${{y}^{2}}+4y-12=0$ . The centre of the circle with PQ as diameter is

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• If ${{c}^{2}}>{{a}^{2}}(1+{{m}^{2}}),$ then the line $y=mx+c$ will intersect the circle ${{x}^{2}}+{{y}^{2}}={{a}^{2}}$

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