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   ocr: PYRAMIDS P YRAMIDS triangular are sides solid that figures meet at with the Vertex (top) Square top. Egyptian pyramids have a cross section square base and are called square- based pyramids. The cross section ofa pyramid with a square base is square. Itis made by cutting a slice through the pyramid that is parallel to the base. Tetrahedrons are similar to pyramids but have four triangular faces ofequal size, including the base, and a triangular cross section. Cross section Cutting a slice through this pyramid parallel to its base gies a sq quare cross section. Square-based pyramid