assuming you meant a pentagon (as i have never heard of a pentgon and neither has google), it is a two dimensional shape with five sides and five angles
Yup
5
It has 5 sides
a pentgon
a Pentagon has 5 sides.
A pentagon has no parallel sides.
5 lines
triangle pentgon heptagon nonagon etc.
If you know one side you know the perimeter which is the whole thing around it.
If it is a quadrilateral it cannot be "not a quadrilateral"!
quadrilateral