The shape has 50 sides is Pentacontagon
A shape with six sides is a hexagon.
Tetradecagon is the correct name for a shape with 14 sides. :D
A shape with three sides is called a triangle.
There is no specific name for such a shape.
The name of the shape is a quadrilateral.
Any shape that has 4 sides is a quadrilateral
An hexagon is the name of a shape that has 6 sides.
A 230-gon. Luckily people gave up on naming particular sided shapes around the time you get to 20 sides. The convention after that is just to state the number of sides, and stick "gon" on the end.
A shape with five sides is pentagonal.
A 2D shape with 9 sides is called a Nonagon.
A pentagon has five sides.