The center and radius/diameter for the circles are
Circle 1: Center = (2, -7), Radius = 4 and Diameter = 8
Circle 2: Center = (0, 0), Radius = 11 and Diameter = 22
Identifying the center and radius/diameter for the circles:
From the question, we have the following parameters that can be used in our computation:
(x + 2)² + (y - 7)² = 16
x² + y² = 121
The equation of a circle with center (h, k) and radius r is given by:
(x - h)² + (y - k)² = r²
Using the above as a guide, we have the following:
Circle 1:
Center = (2, -7)
Radius = 4
Diameter = 8
Circle 2:
Center = (0, 0)
Radius = 11
Diameter = 22