EVERYTHING ABOUT ONE UP BAR

The "base radius" of the circular cone would be the radius of its base; normally this is solely known as the radius of the cone. The aperture of the ideal round cone is the most angle between two generatrix lines; In case the generatrix would make an angle θ on the axis, the aperture is 2θ. In optics, the angle θ is called the 50 percent-angle o