>>75-76
 2個と6個だから
 <S> = {S_(dodecahedron)×2 + S_(tetrakaidecahedron)×6} /8
   = 6S_1 + 6S_5 + (3/2)S_6
   = 150(1+√6) + (3√5 - 2√6 - 3/2)β^2
   = 517.4234614 + 0.309224446933・β^2
   = 529.69504172637044822410534842894…