That is a pentadecagon (or quindecagon or pentakaidecagon.) I doubt anyone would argue with 15-gon, though.
Maths
Double agent.
Double agent.
2 way
Parallelogram
A dodecagon or dudecagon are both acceptable terms
It can be a square or a rhombus but they are both quadrilaterals.
A parallelogram.
Hexadecagon (16 sides) and Octadecagon (18 sides) both fit. Am I missing something?
I'd call a contractor to view the issue, not an insurance question
Give both sides of the argument