Icosahedron.
Chat with our AI personalities
A 20-sided flat figure (polygon) is called an icosagon. If it is a solid figure--three-dimensional--it is an icosahedron.
If it is 3 dimensional it is an icosahedron If it is 2 dimensional it is an icosagon
Icosagon
isosagon * * * * * icosagon.
An icosagon is a two-dimensional polygon, not a three-dimensional figure. An icosagon has 20 sides - while an icosahedron has 20 faces.