It is a Pentegon
A house, or at least an irregular pentegon.
there is no such thing as an eight sided pentagon. You must mean a eight sided polygon. Which is an octagon.
what is the perimeter of a pentegon?
No, a pentagon is not a parallelogram.
five
There are no words in the English language that begin with the letters PENTEGON. Pentagon, pentagonal and pentagons are words that begin with the letters PENTAGON.
Yes.
Pentagonal Prism
No, a hexagon cannot be a pentagon.
A pentagon has five vertices.
A pentagon has five sides.