Prism
A prism has two parallel and congruent bases in the shape of polygons. Example - a cereal box (is rectangular prism). The top and bottom are rectangles(a polygon). They are the same size and shape (congruent) and also parallel. A cube (think of six sided dice) is a special rectangular prism. Imagine a a box where the top and bottom are triangles (of the shape size and shape). This is called a triangular prism.
The bases are pentagons - 5 sided polygons.
No only quadrilateral polygons have 4 sides
The answer is parallel because a parallel has 2 sided figure.
A four sided figure with no parallel sides is a trapezium, but it is also an irregular four-sided polygon, tetragon, quadrilateral, or quadrangle.
they're not. A 10 sided figure is a decagon, while a 12 sided figure is a dodecagon. do=2, deca=10.
One set of 3-d shapes meeting the requirements of the question is all prisms with regular, odd-sided polygons as bases.
Look around you. How many 11-sided polygons do you see?
in mathematical terms trapezoids are 4 sided polygons that have two parallel sides
quadrilateral
A Quadrilateral.