[Pramāṇa](https://indike.org/pramana/) › [Studies](https://indike.org/pramana/ins) › [Science, technology and education](https://indike.org/pramana/ins.science) › [The Science of the Shulba: A Study in Early Hindu Geometry](https://indike.org/pramana/ins.science.datta-1932) › c11.89 # The Science of the Shulba: A Study in Early Hindu Geometry c11.89 The Science of the Śulba: A Study in Early Hindu Geometry c11.89 - **Language:** English ### [c11.89](https://indike.org/pramana/ins.science.datta-1932.c11.89) ² Mahīdhara has once explained \*ekakarṇa\* = “one triangle,” \*dvikarṇa\* = “two triangles,” \*trikarṇa\* = “three triangles” and \*pañcakarṇa\* = “five triangles.” Later on he says \*ekakarṇa\* means “equal angles” and \*dvikarṇa\* “unequal angles.” His former interpretations are certainly wrong. If Kātyāyana had indeed meant “five triangles” by the term \*pañcakarṇa\*, what did he mean by the rule, “Pañcakarṇānāñca praüge apacchidyaikakarṇānāṃ dvikarṇānāṃ samacaturasre apacchidya.” \[“Break up \*pañcakarṇas\* of \*ekakarṇa\* (variety) into isosceles triangles and break up \*pañcakarṇas\* of \*dvikarṇa\* (variety) into squares ?”\] - [Previous: c11.88](https://indike.org/pramana/ins.science.datta-1932.c11.88) - [Next: c11.90](https://indike.org/pramana/ins.science.datta-1932.c11.90) - [Up: c11](https://indike.org/pramana/ins.science.datta-1932.c11) --- Source: [https://indike.org/pramana/ins.science.datta-1932.c11.89](https://indike.org/pramana/ins.science.datta-1932.c11.89) · Pramāṇa