Respuesta :

Answer:

31.4

Step-by-step explanation:

C = 2πr OR C = πd

But, we need to find r first.

[tex]A = \pi r^2\\25\pi = \pi r^2\\\sqrt{25} = \sqrt{r^2} \\r=5\\\\C=2\pi r\\C=2\pi (5)\\C= 10\pi \\C= 31.4[/tex]