Process 1: the straight line of the original semicircle is the circumference of the cone bottom, and the semi-meridian of the cone bottom is r. 2: the area of the original semicircle is the lateral area s of the cone, and s = dl/2 (D is the circumference of the bottom, and l is the generatrix length of the cone (the distance from the top to the bottom)). Therefore, l can be obtained. 3. Use Python to get the cone height h..4 Cone volume: σr * RH/3. Calculation is too troublesome, so do it.