SOLUTION: What is the length of the radius of the circle? (x + 5)2 + (y + 7)2 = 212

Algebra ->  Quadratic-relations-and-conic-sections -> SOLUTION: What is the length of the radius of the circle? (x + 5)2 + (y + 7)2 = 212      Log On


   

Question 377699: What is the length of the radius of the circle?
(x + 5)2 + (y + 7)2 = 212
Answer by Fombitz(32388) About Me  (Show Source):
You can put this solution on YOUR website!
Compare to the general equation for a circle centered at (h,k) with a radius R:
%28x-h%29%5E2%2B%28y-k%29%5E2=R%5E2
.
.
R%5E2=212
R=sqrt%28212%29
highlight%28R=2%2Asqrt%2853%29%29