The Circumradius of Octagon is the radius of circumcircle of the Regular Octagon or the circle that contains the Octagon with all vertices lies on that circle. And is denoted by rc. Circumradius of Octagon is usually measured using the Meter for Length. Note that the value of Circumradius of Octagon is always positive. Typically, the value of Circumradius of Octagon is greater than 0.