decagon
A kite and an arrow head are 2 of them
triangle.
octagon
A pentagon or an irregular pentagon if the sides are unequal in length.
a quadrilateral
hexagon
An octagon.
decagon
A kite and an arrow head are 2 of them
Hexagon
triangle.
A nonagon has 9 sides
octagon
a crescent has 19 sides
A hexagon is an example of a regular polygon with 6 sides.
A pentagon or an irregular pentagon if the sides are unequal in length.