Ten.
Decagon
2D shape = Decagon 3D shape = Decahedron
a ten sided shape is called a decagon and usually 2d
54 Diagonals. * * * * * A polygon with n sides has 1/2*n*(n-3) diagonals. So a decagon would have 1/2*10*7 = 35 diagonals. How the Community answer got 54 is anybody's guess!
Decogon * * * * * A decagon, actually.
this shape is a decagon this shape is a decagon
decagon
It is the decagon.
decagon
A Decagon.
Ten.
Decagon
A ten-sided 2D polygon is known as a decagon.
it is a decagon
2D is a decagon. 3D is a decahydron.
2D shape = Decagon 3D shape = Decahedron