Circumradius of Ellipse is the radius of the circle which contain the ellipse with both the ends of the major axis of the Ellipse are lying on the circle. And is denoted by rc. Circumradius of Ellipse is usually measured using the Meter for Length. Note that the value of Circumradius of Ellipse is always positive. Typically, the value of Circumradius of Ellipse is greater than 0.