@There are a circular cone. And there is a expansion of this circular cone. What expression of relation dose the angle of the side face have by the length of generator and the length of radius of the base? What expression of relation dose the arc of the side face have by the length of generator and the length of radius of the base? What expression of relation dose the area of the side face have by the length of generator and the length of radius of the base? Change the shape of the circular cone to find the geometric quality. |