A triangular prism reflects light at specific angles. Many are used in equipment such as binoculars and telescopes to reduce their physical size.
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a triangular prism has to triangular bases while a rectangular prism has a rectangle as the bases.
A triangular prism
A triangular prism has two triangular faces, a rectangular prism does not have any.
A triangular prism.
you fold into into a triangular prism