r = 5
Step-by-step explanation:
Compare this equation to the standard form
(x - h)^2 + (y - k)^2 = r^2
Through this comparison we see that h = 0, k = 8 and r = 5.
vbbv
step-by-step explanation:
the answer is b. 60. each interior angle in 120, so the exterior angle must be 60 in order to add up to 180