circle

Related Questions

• If a circle and a square have the same perimeter, then

  ---

• The radical centre of three circles described on the three sides of a triangle as diameter is

  ---

• The limit of the perimeter of the regular n-gons inscribed in a circle of radius R as $n\to \infty $ is

  ---

• If O is the origin and OP, OQ are tangents to the circle ${{x}^{2}}+{{y}^{2}}+2gx+2fy+c=0$ , the circumcentre of the triangle $OPQ$ is

  ---

• If a circle passes through the point (1, 2) and cuts the circle ${{x}^{2}}+{{y}^{2}}=4$ orthogonally, then the equation of the locus of its centre is

  ---