Respuesta :

mreijepatmat
EQUATION OF A CIRCLE = (x-h)² + (y-k)² =r²

In this case, since the center of the cercle is in O, then h=0 & k=0

x²+y² = 64
mohawklover97
the answer is 8, i thought it was 4 but my apex class said 8 was the correct answer.