For a nine side polygon its called a nonagon.For a nine side polygon its called a nonagon.For a nine side polygon its called a nonagon.
………………………… is a line segment that joins two vertexof a polygon but is not a side of the polygon.
10 side polygon is called decogon
There is no polygon with one side.
A polygon has 3 or more joined side
convex
concave polygon
8 side = octagon 9 side= Nonagon 10 side= decagon
An exterior angle of the polygon.
Apothem!
An interior or exterior angle of the polygon.
A Apothem