Question

Please check my answer.
Find the equation of the circle with center at (-3, 1) and through the point (2, 13).

My answer:
(x+3)² + (y-1)²=r²
(2+3)² + (13-1)²=r²
6²+12²=r²
36+144=r²
180=13.416

Answer 1

@zepdrix

Answer 2

You are correct as long as I am. As long as you square rooted 180 then that should be your radius.

Answer 3

thanks

Answer 4

Of course