Constructing the Circumcenter of a Triangle

Open a new Geometry window.

Select the Geometry View.

Select the triangle construction tool.

Use the Nav Pad to define the three points of the triangle.

Press Enter at each point.

Select the perpendicular bisector tool and click on each side of the triangle

to create the perpendicular bisector.

Notice that the three bisectors intersect at one point.

Use the point tool to add the intersection point.