Mathematics

• Nubian builders calculated the volumes of masonry and building materials, as well as the slopes of pyramids, for construction purposes.
• a Nubian engraving at Meroe, in ancient Sudan, dated to the first century B.C.E., includes several lines, inclined at a 72--degree angle, running diagonally from the base of a pyramid.
• the Nubians of Meroe constructed more pyramids than the Egyptians, built steep, flat-topped pyramids.