What are the coordinates of the circumcenter of a triangle with vertices A(−1, 1) , B(5, 1) , and C(−1, −1) ?
https://us-static.z-dn.net/files/d24/7c825685ddcaa45d39722e71cec9344d.png
This is a right triangle.....the circumcenter will be at the midpoint of the hypotenuse
The endpoints of the hypotenuse are (-1, -1) and (5, 1)
So the midpoint - and circumcenter - is [ ( 5 - 1) / 2 , (1 - 1 ) / 2 ] = ( 2 , 0)