This pentagon has been constructed to have angles of 90, 90, 90, 100 and 170 degrees. Notice that every angle can be combined with others in some way to make 360 degrees: ... Pentagon Tiling Proof ...

Ok, say I have many pentagons. I want to build an orb or sphere or whatever a 3 dimensional ball out of pentagons.Is there a predetermined limit to the # of pentagon shaped pieces I can use to ...