The names of polygons include triangles, quadrilateral, pentagon, hexagon and the octagon. The other names of polygons are the nonagon, the dodecagon, the octdecagon, the icosagon, hectagon, myriagon and the tetracontagon.

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Some of the common polygons are triangle, pentagon, hexagon and quadrilateral or tetragon. Polygons are two-dimensional shapes made of straight lines, and 'closed' (all the lines join up). They are categorised into: simple, complex, concave, convex, regular and irregular polygons.

Some of the polygons names are: monogon, digon, trigon or triangle, tetragon, pentagon, hexagon, heptagon, octogon, ennagon decagon, hendecagon. You can find more information here: http://mathforum.org/dr.math/faq/faq.polygon.names.html

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