hexagon
quadrilateral
quadrilateral
It can be a quadrilateral, though quadrilaterals are 4-sided shapes in general.
There cannot be a solid three sided figure. A solid 4 sided object is a tetrahedron.
pyramid
hexagon
Pyramid :P
What's wrong with pentahedron?
a quadrilateral
A four sided shape
quadrilateral
quadrilateral
34-gon
It can be a quadrilateral, though quadrilaterals are 4-sided shapes in general.
The four sides are NOT parallel. If the fours sides were parallel , it would NOT be a polygon., but just four lines. The opposite sides are parallel. Being the same length, it could be either a 'SQUARE' or a 'RHOMBUS'. The difference being that the square has four right angles (90 degrees)-. A Rhombus has the opposite angles the same, but not a 90 degrees.
Since I don't have the vaguest idea what it is, I would not call it anything!