What is the name of a 11 sided polygon called?

Answer 1

Some might say an "undecagon", but this is actually incoorect as it is a mixture of the greek and latin nominclature. The preferred (and commonly accpeted) name of a normal 11-sided polygon is "hendecagon".

Further, whist many polygons have specific names many do not. As there are is infinite number of them this would not be possible. It is therefore acceptable to call is an 'n-gon' as in a 53-gon.