ONE UP MUSHROOMS NO FURTHER A MYSTERY

The "foundation radius" of a circular cone may be the radius of its base; frequently this is simply known as the radius on the cone. The aperture of a appropriate round cone is the most angle in between two generatrix lines; if the generatrix will make an angle θ to the axis, the aperture is 2θ. In optics, the angle θ is called the half-angle on