Answer:
Circumcenter of triangle

Explanation:
Given coordinates are

We will draw these points on the graph.
Let
,
and

We can see it is a right-angle triangle.
Let
be the midpoint of line

So, the coordinate of the point
will be

Also, we know the coordinates of circumcenter of a right angle triangle will be midpoint of its hypotenuse.
So, coordinates of circumcenter is
