Answer :
A triangle is obtained when a right rectangular pyramid is sliced by a plane that is perpendicular to the base of the pyramid.
A rectangular pyramid is a three-dimensional object with a rectangle base and a triangular face corresponding to each of the sides of the base.
Cross - sections perpendicular to the base and through the vertex will be triangles. A triangle is obtained as a right rectangular pyramid is sliced by a plane that is perpendicular to the base of the pyramid.
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