The circumcenter of a triangle

The circumcenter of a triangle is point where the three perpendicular bisectors of each side intersect. A perpendicular bisector is a line drawn onto each side of the triangle so that it bisects and is perpendicular to that side. 
One interesting fact about the circumcenter of a triangle is that it is the center of the circumcircle, which is unique to every triangle. It has the three points of the triangle on it. 

The three perpendicular bisectors, the circumcenter, and the circumcircle of a triangle.