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Investigating a Circumscribed Circle about a Triangle

The applet below shows a circle circumscribed about triangle ABC with circumcenter at J. Recall that the circumcenter is the point of concurrency of perpendicular bisector of all three sides of a triangle. Drag any of the vertices of triangle ABC. When do you observe point J to be inside or outside the triangle, or lying on a side of the triangle? Write down all other observations you may have.