The sides of an oblique prism do not meet the base at a 90° angle.
Again, that base can be any polygon.
The most common oblique prism is the pyramid. A pyramid is a three-
dimensional shape with a regular polygon base and congruent triangular
sides that meet at a common point. Pyramids are named by the shape of
their bases, as demonstrated in the following three figures:
Triangular
PyramidSquare
PyramidPentagonal
Pyramid501 Geometry Questions