what are the names of 14,15,16,17,18,19 & 20 sided shapes?

Question

Need anwers for my daughters homework!!

Answer 1

20 sides is NOT a dodecagon; a dodecagon has 12 sides. The exact names depend on whether you are referring to 2-dimensional polygons or 3-dimensional polyhedra.

In most cases, honestly, no one uses an actual word to refer to either polygons or polyhedra with these numbers of sides. The one exception is a 20-sided 3-D shape (an icosahedron), which is one of the "Platonic solids" that can be formed from all regular polygons. Besides that, the way mathematicians refer to the two-dimensional shapes is with terms like 14-gon, 15-gon, etc. They honesly don't refer to the three-dimensional objects, because there's not much purpose to a non-regular polyhedron with so many sides.

Answer 2

A 20-sided 2-Dimensional shape is an Isagon A 20-faced 3-Dimensional shape is an Icosahedron Here is FAMILY of FLAT - TWO DIMENSIONAL figures:- Polygon names Name Edges henagon (or monogon) 1 digon 2 triangle (or trigon) 3 quadrilateral (or tetragon) 4 pentagon 5 hexagon 6 heptagon (avoid "septagon" = Latin [sept-] + Greek) 7 octagon 8 enneagon (or nonagon) 9 decagon 10 hendecagon (avoid "undecagon" = Latin [un-] + Greek) 11 dodecagon (avoid "duodecagon" = Latin [duo-] + Greek) 12 tridecagon (or triskaidecagon) 13 tetradecagon (or tetrakaidecagon) 14 pentadecagon (or quindecagon or pentakaidecagon) 15 hexadecagon (or hexakaidecagon) 16 heptadecagon (or heptakaidecagon) 17 octadecagon (or octakaidecagon) 18 enneadecagon (or enneakaidecagon or nonadecagon) 19 icosagon 20 No established English name ("hectagon" is bad Greek, "centagon" is a Latin-Greek hybrid; neither is widely attested. 100 chiliagon 1000 myriagon 10,000 googolgon 10100 Naming polygons To construct the name of a polygon with more than 20 and less than 100 edges, combine the prefixes as follows Tens and Ones final suffix -kai- 1 -hena- -gon 20 icosi- 2 -di- 30 triaconta- 3 -tri- 40 tetraconta- 4 -tetra- 50 pentaconta- 5 -penta- 60 hexaconta- 6 -hexa- 70 heptaconta- 7 -hepta- 80 octaconta- 8 -octa- 90 enneaconta- 9 -ennea- In many cases KAI is not necessary. That is, a 42-sided figure would be named as follows: Tens and Ones final suffix full polygon name tetraconta- -kai- -di- -gon - tetracontakaidigon and a 50-sided figure Tens and Ones final suffix full polygon name pentaconta- -gon - pentacontagon But beyond enneagons and decagons, professional mathematicians prefer the aforementioned numeral notation (for example, MathWorld has articles on 17-gons and 257-gons). Hope this helps - :-)

Answer 3

17 sided shape is called?

Answer 4

They are called Polygons If you need to name them specifically email me. They are all called Polygons, put they have different types for each side. [e-mail]

Answer 5

14 sided is a tetradecagon.

Answer 6

20 is a Dodecahedron. I dont know any others

Answer 7

http://en.wikipedia.org/wiki/Polyhedron

Depends also on how the shape is shaped...follow the link and find out.

http://en.wikipedia.org/wiki/List_of_uniform_polyhedra
A list of many of them.

Answer 8

http://www.youtube.com/watch?v=RlVHs0Wo9S0

Answer 9

polyhedron