7. Circles in the Coordinate Plane
Sign In
What is the standard equation of a circle?
(x+3)^2+(y-4)^2=1
(x- h)^2+(y- k)^2= r^2 In this form, ( h, k) is the center of the circle and r is its radius. We are told that the center of the circle is ( - 3, 4) and its radius is 1. This information is enough to write the equation. (x-( - 3))^2+(y- 4)^2= 1^2 ⇕ (x+3)^2+(y-4)^2=1