NOT KNOWN FACTUAL STATEMENTS ABOUT ONE UP MUSHROOM

The "base radius" of a circular cone could be the radius of its base; frequently this is simply called the radius of the cone. The aperture of a ideal round cone is the utmost angle among two generatrix lines; if the generatrix would make an angle θ to your axis, the aperture is 2θ. In optics, the angle θ is known as the 50 %-angle from the cone