What is the standard equation of a circle? Precalculus Polar Equations of Conic Sections Writing Polar Equations for Conic Sections 1 Answer AJ Speller Sep 28, 2014 Standard equation for a circle (x-h)^2+(y-k)^2=r^2 where (h,k) is the center of the circle where r is the radius of the circle Answer link Related questions How do you identify conic sections? What is the meaning of conic section? What is the standard equation of a parabola? What is the standard equation of a hyperbola? Which conic section has the polar equation r=1/(1-cosq)? Which conic section has the polar equation r=2/(3-cosq)? Which conic section has the polar equation r=a sintheta? How do you find a polar equation for the circle with rectangular equation x^2+y^2=25? What are the polar coordinates of (x-1)^2-(y+5)^2=-24? How do you write the polar equations for x = -3? See all questions in Writing Polar Equations for Conic Sections Impact of this question 5912 views around the world You can reuse this answer Creative Commons License