A decahedron is a closed 3-D shape with ten polygonal faces. There are 32,300 topologically different decahdra and, since none of these are regular, the term is ambiguous. Some simple decahedra are:
2 lines of Symetry
A regular octogan has 8 lines of symetry, and a irregular octogan has 2 lines of symetry.
how many lines of symetry does the letter R have
5 lines
it have 4 lines
a rhombus has no lines of symetry
2 lines of Symetry
A regular octogan has 8 lines of symetry, and a irregular octogan has 2 lines of symetry.
A circle has an infinite amount of lines of symetry.
how many lines of symetry does the letter R have
5 lines
it have 4 lines
It has no lines of symetry at all.
1
4
10
Infinite