Question

Identify the radius of the circle whose equation is (x - 2)^2 + (y - 8)^2 = 16.

Answer 1

The radius is 4
the equation of a circle is (x-h)^2+(y-k)^2=r^2
in this case, 16=r^2
so r=4

Answer 2

16^2 is the radius, so 16 squared is 4. Therefore the radius is equal to 4