Note that in any standard form of the circle :
(x - h)^2 + (y - k)^2 = r^2
The center is at (h ,k) and radius is r
From the given problem :
(x + 5)^2 + (y + 6)^2 = 49
This can be written as :
(x + 5)^2 + (y + 6)^2 = 7^2
So the radius of the circle is 7 units
Now the formula for the circumference of a circle is :
C = 2πr
Substitute the radius :
C = 2π(7)
C = 43.98 units or 44.0 units
