A 7 sided polygon is known as an heptagon
no
Yes.
Hexagon
a polygon is convex
If the polygon (not ploygon!) has n vertices, the sum of the angles is (n-2)*pi radians or (n-2)*180 degrees.
An heptagon sometimes called a septagon.
no
Yes.
A triangle.
No, it's a POLYGON.
Hexagon
a megcagon
as many as it wants
a tetradecagon
heptagon
Pentagon
PENTAGON!!!