Answer:
r=7
Step-by-step explanation:
We have the equation
(x+5)^2 + (y+8)^2 =
We know that this is equal to the radius squares
(2+5)^2 + (-8+8)^2 = r^2
We know a point on the circle (2,-8)
Substitute this point into the equation
(2+5)^2 + (-8+8)^2 = r^2
(7)^2 + (0)^2 = r^2
7^2 = r^2
The radius is equal to 7
