Little Star Homeschool

Robert's latest mathematical quest is to know the names of every 2 dimensional geometrical object. If you are curious too, here they are (courtesy of Dr Math):

1  monogon                  (Monogon and digon can only
   2  digon                     be used in rather special
   3  trigon, triangle          circumstances. Trigon and
   4  tetragon, quadrilateral   tetragon are alternatives to
   5  pentagon                  triangle and quadrilateral;
   6  hexagon                   the adjectival forms trigonal
   7  heptagon                  and tetragonal are more common.)
   8  octagon
   9  enneagon

  10  decagon
  11  hendecagon
  12  dodecagon
  13  triskaidecagon
  14  tetrakaidecagon, tetradecagon
  15  pentakaidecagon, pentadecagon
  16  hexakaidecagon, hexadecagon
  17  heptakaidecagon
  18  octakaidecagon
  19  enneakaidecagon

  20  icosagon
  21  icosikaihenagon, icosihenagon
  22  icosikaidigon
  23  icosikaitrigon
  24  icosikaitetragon
  25  icosikaipentagon
  26  icosikaihexagon
  27  icosikaiheptagon
  28  icosikaioctagon
  29  icosikaienneagon

  30  triacontagon
  31  triacontakaihenagon
  32  triacontakaidigon
  33  triacontakaitrigon
  34  triacontakaitetragon
  35  triacontakaipentagon
  36  triacontakaihexagon
  37  triacontakaiheptagon
  38  triacontakaioctagon
  39  triacontakaienneagon

  40  tetracontagon
  41  tetracontakaihenagon
  42  tetracontakaidigon
  43  tetracontakaitrigon
  44  tetracontakaitetragon
  45  tetracontakaipentagon
  46  tetracontakaihexagon
  47  tetracontakaiheptagon
  48  tetracontakaioctagon
  49  tetracontakaienneagon

  50  pentacontagon ...
  60  hexacontagon ...
  70  heptacontagon ...
  80  octacontagon ...
  90  enneacontagon ...
 100  hectogon, hecatontagon
1000  chiliagon
10000  myriagon