A kite and an arrow head are 2 of them
decagon
triangle.
octagon
A pentagon or an irregular pentagon if the sides are unequal in length.
A hexagon is an example of a regular polygon with 6 sides.
a quadrilateral
hexagon
An octagon.
decagon
there is no sutch thing in the holl intier world or uneveres anlese some one made a shap up called one set of parellel sides
Hexagon
triangle.
A nonagon has 9 sides
octagon
A trapezoid, trapezium and a pentagon have only 1 set of parallel linesRead more: What_3_shapes_have_1_set_of_parallel_lines
a crescent has 19 sides
A pentagon or an irregular pentagon if the sides are unequal in length.