■等面単体の体積(その368)

 n=9の展開図については確認せずに・・・

  P1P2=P2P3=P3P4=P4P5=P5P6=P6P7=P7P8=P8P9=3

  P1P3=P2P4=P3P5=P4P6=P5P7=P6P8=P7P9=4

  P1P4=P2P5=P3P6=P4P7=P5P8=P6P9=√21

  P1P5=P2P6=P3P7=P4P8=P5P9=√24

  P1P6=P2P7=P3P8=P4P9=5

  P1P7=P2P8=P3P9=√24

  P1P8=P2P9=√21

  P1P9=√4

     =P2P3=P3P4=P4P5=P5P6=P6P7=P7P8=   =3

  P1P3=   =P3P5=P4P6=P5P7=   =P7P9=4

  P1P4=P2P5=   =   =P5P8=P6P9=√21

  P1P5=   =P3P7=   =P5P9=√24

     =   =   =   =5     → 真ん中の行はNG

  P1P7=P2P8=P3P9=√24

  P1P8=P2P9=√21

  P1P9=4

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