Cube root this required the construction, now known to be impossible, of the length . A method for extracting cube roots appears in "The Nine Chapters on the Mathematical Art", a Chinese mathematical text compiled around the 2nd century BCE and commented on by Liu Hui in the 3rd century CE. The Greek mathematician Hero of Alexandria devised a method for calculating cube roots in the 1st century CE. His formula is again mentioned by Eutokios in a commentary on Archimedes. In 499 CE Aryabhata, a mathematician-astronomer from the classical age of Indian mathematics and Indian astronomy, gave a method for finding
Texas State Highway Spur 729 Texas State Highway Spur 729 Spur 729 is an approximately state highway spur in King County, Texas. , it was the highest numbered spur route in the Texas state highway system, until the completion of Spur 1966. Spur 729 has an eastern terminus at an at-grade intersection with US 83 near the buildings of the Guthrie Common School District. The short route travels to the west along 6th Street, ending at a barricaded dead end. Spur 729 was designated on July 26, 2007 after TxDOT rerouted US 82 / SH 114 around Guthrie. Originally, US 82 entered Guthrie from the