There need not be any.
A decagon need not have any lines of symmetry. It can also have 1 or 10 lines of symmetry.
A decagon need not have any lines of symmetry. It can have 10.
Ten.
6
A dodecagon need not have any lines of symmetry. It can have a maximum of 12.
A decagon need not have any lines of symmetry. It can also have 1 or 10 lines of symmetry.
A decagon need not have any lines of symmetry. It can have 10.
10 lines of symmetry
7
A regular decagon has rotational symmetry = 10.For irregular decagons, it could be less (either 2 or none.)
10
Ten.
6
A dodecagon need not have any lines of symmetry. It can have a maximum of 12.
ice cream and panckakes * * * * * A decagon need not have any but the default number (1) of rotational symmetry. It can have rotational symmetry of order 2, 5 or 10.
10 axes of symmetry
heck yeah it does * * * * * It can do, but it need not have any non-trivial rotational symmetry. A regular decagon will have rotational symmetry of order 10.