Trafalgar Square capital. Building work on the south side of the square in the late 1950s revealed deposits from the last interglacial. Among the findings were the remains of cave lion, rhinoceros, straight-tusked elephant and hippopotamus. The site of Trafalgar Square has been a significant location since the 13th century. During Edward I's reign, the area was the site of the King's Mews, running north from the original Charing Cross, where the Strand from the City met Whitehall coming north from Westminster. From the reign of Richard II to that of Henry VII, the mews was at the western end of the
Set square for "geometry triangle"), it was originally developed and trademarked by the German-Austrian manufacturer "Aristo-Instrumente Dennert KG" (now "GEOtec Zeichen- und Kunststofftechnik GmbH") in 1964. Set square A set square or triangle (American English) is an object used in engineering and technical drawing, with the aim of providing a straightedge at a right angle or other particular planar angle to a baseline. The simplest form of set square is a triangular piece of transparent plastic (or formerly of polished wood) with the centre removed. More commonly the set square bears the markings of a ruler and a half circle protractor. The