by Moustafa Mawaldi Published on: 3rd December 2019

by Moustafa Mawaldi Published on: 22nd September 2008

The Greek letter pi (symbolized by p) is defined as the ratio of the circumference of the circle to its diameter. It is considered to be a vital element in the calculations of areas and…

by Moustafa Mawaldi Published on: 29th June 2008

Fakhr al-Dīn Ridhwān ibn Rustam al-Sā'ātī (d. between 618-626 H/1220-1229 CE) was a scholar and mechanical engineer, author of the book ‘Ilm al-sā'āt wa 'l-'amal bihā in which he described the famous public clock set…