Every solid. All you need is the intersection with a plane parallel to the base.
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It is a horizontal cross-section. Its shape will depend on the shape of the solid and its orientation.
there are no square pyramids. they are not of the same
Sphere
The vertical cross sections are trapezia or triangles. The horizontal cross sections are rectangles which are mathematically similar to the base.
A cylinder has a circular cross section that is parallel to its base.