What's the equation for a circle with a center of (-2, 1) and a radius of 3.

Question

asked Oct 16, 2020 191k views

1 Answer

Trenton Trama · Answer 1 · 2020-10-20T10:32:10+0000

Answer:

(x+2)^2 + (y-1)^2 = 9

Explanation:

The equation of a circle is written with the center and radius into the vertex form
(x-h)^2 + (y-k)^2 = r^2 .

Here h = -2 and k = 1. Substitute these values with r = 3.

$(x--2)^2 + (y-1)^2 = 3^2\\(x+2)^2 + (y-1)^2 = 9$