Answer :
Imagine slicing a triangular prism, perpendicular to the two bases.
You would basically just be lopping off some congruent triangle from each base.
The now-exposed inside of the prism would be a rectangle.
(see attached diagrams)
You would basically just be lopping off some congruent triangle from each base.
The now-exposed inside of the prism would be a rectangle.
(see attached diagrams)

