Question

Write the equation of a circle with a radius of 8 and a center at (4, -9).

Answer 1

The equation of a circle with radius r and center at (h,k) is given by:

(x + h)² + (y + k)² = r²

If r = 8 and (h,k) = (4,-9), we have:

(x-4)² + (y + 9)² = 8²