History of Hindu Mathematics: A Source Book v2.c17.s18.21

v2.c17.s18.21

The Sanskrit word *iṣṭa* can be interpreted as implying “given” as well as “optional”. With the former meaning the rule will state how to find rational right triangles having a given leg. Such is, in fact, the interpretation which has been given to a similar rule of Bhâskara II.³