What is the equation of the circle with a center at #(-3 ,-1 )# and a radius of #5 #? Geometry Circles Equation of a Circle 1 Answer Trevor Ryan. Jan 19, 2016 #(x+3)^2+(y+1)^2=25# Explanation: Any circle centred at #(a,b)# and with radius #r# has general equation #(x-a)^2+(y-b)^2=r^2#. Answer link Related questions How do you write the general form given a circle that passes through the given points. P(-2, 0),... What is the equation of the circle with a center at #(7 ,1 )# and a radius of #2 #? What is the equation of the circle with a center at #(3 ,1 )# and a radius of #2 #? What is the equation of the circle with a center at #(3 ,1 )# and a radius of #1 #? What is the equation of the circle with a center at #(3 ,5 )# and a radius of #1 #? What is the equation of the circle with a center at #(3 ,5 )# and a radius of #6 #? What is the equation of the circle with a center at #(2 ,5 )# and a radius of #6 #? What is the equation of the circle with a center at #(2 ,2 )# and a radius of #4 #? What is the equation of the circle with a center at #(2 ,2 )# and a radius of #3 #? What is the equation of the circle with a center at #(2 ,1 )# and a radius of #3 #? See all questions in Equation of a Circle Impact of this question 4402 views around the world You can reuse this answer Creative Commons License