Answer: The radius of the circle is 12 units.
Step-by-step explanation: The given equation of a circle is as follows :

We are to find he radius of the circle.
We know that
the standard form of the equation of a circle with center at the point (h, k) and radius r units is given by

From equation (i), we have

Comparing the above equation with the standard form, we get
radius, r = 12 units.
Thu, the radius of the circle is 12 units.