A two-dimensional shape with twenty sides is an icosagon. A three-dimensional object with twenty sides is an icosahedron.
Decahedron, the prefix "deca-" coming from Latin or Greek meaning "ten". (Eg. "decade" meaning "ten years".
A 10-sided polygon is a decagon.
A 10-sided 3D solid is a decahedron.
Quadrilateral
Dirk means "ruler of the people"; it is also a short dagger, usually a double-sided blade
twenty (in Spanish) = veinte twenty-one/two etc. = veintiuno/dos etc. 'venti' is Italian for twenty
Un croissant gets its name from its crescent shape.
Twenty years old is はたち
viginti et duo (XXII: twenty and two.)
Icosikaihenagon
a 24 sided polygon is a icosikaitera.
A regular twenty-sided polygon is called an icosagon.
Icosahedron is the shape, but it's just called 20 sided if you want to buy one.
A twenty sided, 2D figure is called an icosagon.
Icosahedron
it is a twenty sided shape
The name for a 57 sided shape is derived by combining the name for a 50 sided shape with the name for a 7 sided shape. A 57 sided shape is called a pentacontaheptagon.
i think it is a twenty sided shape because deca means 10 and do just means two so its most likely to be a twenty sided shape.
hendaciahedron
icosikaienneagon
The name of a 51 sided polygon is Pentaconhenagon. The name of a 52 sided polygon is Pentacondigon. The name of a 53 sided polygon is Pentacontrigon. The name of a 54 sided polygon is Pentacontetragon. The name of a 55 sided polygon is Pentaconpentagon. The name of a 56 sided polygon is Pentaconheptagon. The name of a 57 sided polygon is Pentaconhexagon. The name of a 58 sided polygon is Pentaconoctagon. The name of a 59 sided polygon is Pentaconenneagon.