hexagon
A hexahedron is the name for a 6 sided 3D shape.
A 6-sided shape is called a hexagon.
And it is a plane shape.
cube
what is the name of a 6 sided shape
A 7 sided shape is a heptagon
It does not exist.
24
An hexagon is the name of a shape that has 6 sides.
pentadecahedron
Decagon