Do you ever think before to model a football in SolidWorks, it looks simple since it is a round shape. Somehow, when you really look into it, you will found that there is a "hidden challenge" inside! Due to the shape is form with a combination of hexagon and pentagon, how would you control the number and size for each of them in order to get a sphere with certain diameter???
I have download and explore a SolidWorks football model from 3D Content Central, here is the video to show how's the model being constructed! Any idea on how to obtain the ~16 deg and ~ 21 deg of the "cut extrude"in order to obtain the very 1st pentagon and hexagon?