What do you notices as you arrange the segments?
If three or more lines intersect at a single point, then the lines are [b]concurrent lines[/b] The point where three or more lines intersect is called a [b]point of concurrency[/b]. The point of concurrency for perpendicular bisectors is called the [b]circumcenter[/b].
What do you notice about the circumcenter D? Use the distance measuring feature to find the distance from the point D to each vertex. Manipulate the triangle one more time. What do you notice?
The circumcenter of any triangle is [b]equidistant[/b] to the vertices of the triangle.