出典:Wikipedia
出典:『Wikipedia』 (2011/06/04 05:17 UTC 版)
The seked (or seqed) was an ancient Egyptian unit for the measurement of the slope of an inclined surface. The system was based on the Egyptian's linear measure known as the royal cubit. The royal cubit was subdivided into seven palms and each palm was further divided into four digits. The inclination of measured slopes was therefore expressed as the number of palms and digits moved horizontally for each royal cubit rise.