circle

Related Questions

• ABC is a triangle in which angle C is a right angle. If the coordinates of A and B be (–3, 4) and (3, –4) respectively, then the equation of the circumcircle of triangle ABC 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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• The line $ax+by+c=0$ is a normal to the circle ${{x}^{2}}+{{y}^{2}}={{r}^{2}}$ . The portion of the line $ax+by+c=0$ intercepted by this circle is of length

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• Equation of a circle whose centre is origin and radius is equal to the distance between the lines $x=1$ and $x=-1$ is

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• The equations of the tangents drawn from the point (0, 1) to the circle ${{x}^{2}}+{{y}^{2}}-2x+4y=0$ are

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