The equation of a circle is represented as:
Here, (h, k) represents the center of the circle, and 'r' represents the radius of the circle.
According to given parameters:
(h, k) = (0, 0)
or
h = 0
k = 0
and
r = 8
Now, put all the values in the above equation to get the equation of the circle.
Hence, the equation of circle is x^2 + y^2 = 64.