__Circumcenter (C)__

The circumcenter (C) is
the point that is equidistant from the three vertices of a triangle. *That* sounds like a “center” for a
triangle, doesn’t it? Let’s have a look:

Now let’s move one of the vertices and see what happens to C.

Let’s move the vertex way out and see what happens:

It seems like deciding on what “center” should mean is
actually pretty hard. If you want to play with the circumcenter then **click
here**.