Answer:
What is a rectangular prism?
A solid (3-dimensional) object which has six faces that are rectangles.
It has the same cross-section along a length, which makes it a prism.
It is also a "cuboid".
What is a triangular prism?
In geometry, a triangular prism is a three-sided prism; it is a polyhedron made of a triangular base, a translated copy, and 3 faces joining corresponding sides. A right triangular prism has rectangular sides, otherwise it is oblique. A uniform triangular prism is a right triangular prism with equilateral bases, and square sides.
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