circle

Related Questions

• Equation of the tangent to the circle ${{x}^{2}}+{{y}^{2}}={{a}^{2}}$ which is perpendicular to the straight line $y=mx+c$ is

  ---

• If the centre of a circle which passing through the points of intersection of the circles ${{x}^{2}}+{{y}^{2}}-6x+2y+4=0$ and ${{x}^{2}}+{{y}^{2}}+2x-4y-6=0$ is on the line $y=x$ , then the equation of the circle is

  ---

• The straight line $x-y-3=0$ touches the circle ${{x}^{2}}+{{y}^{2}}-4x+6y+11=0$ at the point whose co-ordinates are

  ---

• If the vertices of a triangle be $(2,\ -2)$ , $(-1,\ -1)$ and (5, 2), then the equation of its circumcircle is

  ---

• If the straight line $y=mx$ is outside the circle ${{x}^{2}}+{{y}^{2}}-20y+90=0$ , then

  ---