[Pramāṇa](https://indike.org/pramana/) › [Studies](https://indike.org/pramana/ins) › [Science, technology and education](https://indike.org/pramana/ins.science) › [A History of the Kerala School of Hindu Astronomy (in Perspective)](https://indike.org/pramana/ins.science.sarma-1972) › c8.s5.1 # A History of the Kerala School of Hindu Astronomy (in Perspective) c8.s5.1 A History of the Kerala School of Hindu Astronomy (in Perspective) c8.s5.1 - **Language:** English ### [c8.s5.1](https://indike.org/pramana/ins.science.sarma-1972.c8.s5.1) In Western mathematics, the eighteenth century mathematician Lhuiler is credited with the discovery, in 1782, of an expression for the circum-radius of a cyclic quadrilateral.² In India, however, we find the same formula enunciated by the Kerala astronomer Parameśvara (c. 1360-1455) in his commentary on the \*Līlāvatī\*, in the following lines : - [Previous: c8.s4.26](https://indike.org/pramana/ins.science.sarma-1972.c8.s4.26) - [Next: c8.s5.2](https://indike.org/pramana/ins.science.sarma-1972.c8.s5.2) - [Up: c8.s5](https://indike.org/pramana/ins.science.sarma-1972.c8.s5) ## Linked texts (1) - [Līlāvaī](https://indike.org/pramana/in.lit.kavya.prakrit.lilavai) — Kouhala, Māhārāṣṭrī Prakrit --- Source: [https://indike.org/pramana/ins.science.sarma-1972.c8.s5.1](https://indike.org/pramana/ins.science.sarma-1972.c8.s5.1) · Pramāṇa