The radius of the circle whose equation is (x - 3)² + (y + 1)² = 16 is

The radius of the circle whose equation is (x - 3)² + (y + 1)² = 16 is:

                              4 units.

We know that the general equation of a circle with center at (h,k) and radius 'r' is represented by the equation:

Here we are given a equation as:

i.e. on comparing the given equation with the general equation we have

h=3 and k= -1

and

on taking square root we get:

          Hence, the radius of the equation is:

                            4 units