Answer:
Explanation: The formula for the equation of a circle is shown below.
(x - h)² + (y - k)² = r²
In the equation, (h,k) is the center of the circle and r is the radius.
To find the radius, we look at the original formula and notice that the radius squared is equal to 16 or r² = 16.
Simply take the square root of both sides to get r = 4.
So this circle has a radius of 4.
