A polygon is 2-d. A wedge is 3-d. So the question does not make much sense.
A pentagon if all sides are equal - if they are not it is called a polygon
A seven sided polygon
An arrow-shaped polygon is often referred to as a "delta" or "arrowhead" shape. In geometric terms, it can also be classified as a type of quadrilateral or a non-convex polygon, depending on its specific angles and sides. The term "arrow" may also describe the overall shape rather than a formal classification in geometry.
It would be a dodecagon.
The Pentagon is a famous building that has an unusual shape, that of a pentagon or 5-sided polygon. But most buildings are shaped like polygons. It is just that they are shaped like rectangles and squares, which are also polygons.
A wedge shaped portion of a circle is called a sector.
One of several wedge shaped peninsulas around the world is called the Istrian Peninsula.
the wedge shaped writing system is called cuneiform.
cuneiform
the wedge shaped writing system is called cuneiform.
cuneiform
the name of the wedge-shaped writing form is called cuneiform. It consisted of hundreds of wedge-shaped marks cut into damp clay.
Cuneiform
a rhombus
dodecagon
cuneiform
Sector