A pyramid (from Greek: ÏÏ
ÏÎ±Î¼Î¯Ï pyramis) is a structure whose shape is roughly that of a pyramid in the geometric sense; that is, its outer surfaces are triangular and converge to a single point at the top. The base of a pyramid can be trilateral, quadrilateral, or any polygon shape, meaning that a pyramid has at least three outer triangular surfaces (at least four faces including the base). The square pyramid, with square base and four triangular outer surfaces, is a common version.
Not one, not 2, or 3, 5, 10 – but 17 new pyramids were found by a new Egyptian satellite survey. A dozen and a half pyramids The survey also detected 1,000 tombs and 3,000 ancient settlements, using infrared images to detect the underground buildings; the satellites were equipped with cameras that could pinpoint objects [...]