Inradius of Ellipse is the radius of the circle which contained by the ellipse with both the ends of the minor axis of the Ellipse lying on the circle. And is denoted by ri. Inradius of Ellipse is usually measured using the Meter for Length. Note that the value of Inradius of Ellipse is always positive. Typically, the value of Inradius of Ellipse is greater than 0.