Question

A triangular pyramid is pictured below. Select the type of cross section formed when the figure is cut parallel to its base.
GPT-4o mini
When a triangular pyramid (also known as a tetrahedron) is cut by a plane that is parallel to its base, the resulting cross-section will also be a triangle. This is because cutting parallel to the base maintains the shape and proportionality of the original triangular base. The size of the cross-section will depend on the height at which the cut is made, but its shape will remain triangular.