icosikaihenagon
Icosikaihenagon
You can either call them by n-gon for n sides (i.e. 21-gon) or combine a prefix and suffix (i.e. Icosikaihenagon). No. of No. of Sides Name Prefix Name Suffix Sides 20 Icosikai... ...henagon 1 30 Triacontakai... ...digon 2 40 Tetracontakai... ...trigon 3 50 Pentacontakai... ...tetragon 4 60 Hexacontakai... ...pentagon 5 70 Heptacontakai... ...hexagon 6 80 Octacontakai... ...heptagon 7 90 Enneacontakai... ...octagon 8 ...enneagon 9 source: http://www.pubquizhelp.com/sci/polygon.html
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Names of Polygons1 monogon (Monogon and digon can only2 digon be used in rather special3 trigon, triangle circumstances. Trigon and4 tetragon, quadrilateral tetragon are alternatives to5 pentagon triangle and quadrilateral;6 hexagon the adjectival forms trigonal7 heptagon and tetragonal are more common.)8 octagon9 enneagon10 decagon11 hendecagon12 dodecagon13 triskaidecagon14 tetrakaidecagon, tetradecagon15 pentakaidecagon, pentadecagon16 hexakaidecagon, hexadecagon17 heptakaidecagon18 octakaidecagon19 enneakaidecagon20 icosagon21 icosikaihenagon, icosihenagon22 icosikaidigon23 icosikaitrigon24 icosikaitetragon25 icosikaipentagon26 icosikaihexagon27 icosikaiheptagon28 icosikaioctagon29 icosikaienneagon30 triacontagon31 triacontakaihenagon32 triacontakaidigon33 triacontakaitrigon34 triacontakaitetragon35 triacontakaipentagon36 triacontakaihexagon37 triacontakaiheptagon38 triacontakaioctagon39 triacontakaienneagon40 tetracontagon41 tetracontakaihenagon42 tetracontakaidigon43 tetracontakaitrigon44 tetracontakaitetragon45 tetracontakaipentagon46 tetracontakaihexagon47 tetracontakaiheptagon48 tetracontakaioctagon49 tetracontakaienneagon50 pentacontagon ...60 hexacontagon ...70 heptacontagon ...80 octacontagon ...90 enneacontagon ...100 hectogon, hecatontagon1000 chiliagon10000 myriagon
icosikaihenagon
icosikaihenagon
Icosikaihenagon
Icosikaihenagon
Icosikaihenagon
Icosikaihenagon, or also known as Henicosagon.
The term for a 21 sided polygon is an icosikaihenagon. Icosi is the Greek for the numerical 20 and henagon means 1.
The sum is 3420 as the equation for every regular polygon is (n-2)*180 when n is number of sides
Oh, dude, a 21-sided polygon is called a icosikaihenagon. Yeah, I know, it sounds like something you'd make up after a few too many drinks at a math convention. But hey, that's the beauty of geometry - it's like a party where all the shapes get together and have a good time.
This is a 21 sided polygon and therefore has 21 angles. NOTE : The name supplied for this polygon is an artificial name and never used in practice. General usage refers to this shape as a 21-gon.
Well, honey, a 25 sided polygon is called a "icosikaihenagon." Yes, it's a mouthful, just like your nosy neighbor's gossip. So next time you need to impress someone with your geometry knowledge, just drop that bombshell of a word and watch them squirm.
2D PolygonsIcosagon (20 sides)Icosikaihenagon (21 sides)Icosikaidigon (22 sides)Icosikaitrigon (23 sides)Icosikaitetragon (24 sides)Icosikaipentagon (25 sides)Icosikaihexagon (26 sides)Icosikaiheptagon (27 sides)Icosikaioctagon (28 sides)Icosikainoenneagon (29 sides)3D PolyhedraIcosahedron (20 faces)21-29 faces are same as the 2D names but with '-hedron' instead of '-gon' at the end.Also:Isosceles Triangle / Trapezoid(Trapezium)