Respuesta :

mhanifa

Answer:

Circle formula:

  • (x - h)² + (y - k)² = r²

Compare with given circle:

  • (x - 9)² + (y - 4)² = 36 = 6²

We see that:

  • h = 9,
  • k = 4,
  • r = 6

Diameter is twice the radius:

  • Diameter = 6*2 = 12