Question

Identify the radius and center of each

1. x^2 + y^2 = 324

2. (x+2)^2 + (y-3)^2= 183

Answer 1

(0,0) - 18
(-2,3) - sqrt of 183

Answer 2

The first one is centered at the origin, with radius 36 (the square root of 324).
The second has the center at (-2,3) and radius square root of 183.

Answer 3

Recall that the formula for a circle with center (h,k) and radius r is
(x-h)^2+(y-k)^2=r^2