The claim of Semir Osmanagic that the hills surrounding Visoko, Bosnia, represent human-built pyramids is a classic example of arguing from personal incredulity, a fallacious form of argumentation ...
A 3D shape with all straight edges and flat faces is a polyhedron. Other 3D shapes with least one curved surface are not polyhedra. A 3D shape with regular polygonal faces, meeting at equal angles, is ...
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