Easing the Difficulty of Arithmetic and Planar Geometry


This work is a comprehensive tutorial guide on arithmetic and plane geometry, in 197 folio pages. It also discusses monetary conversion. The work is composed in verse form, and is meant as a commentary on existing textbooks. The author gives the following personal account of the writing of this guide: In Rajab 827 A.H. (May 1424) he traveled from Damascus to Quds al-Sharīf (in Palestine), where he met two scholars named Ismā‘īl ibn Sharaf and Zayn al-Dīn Māhir. There he took lessons on arithmetic, using an introductory book by Shahāb al-Dīn Aḥmad ibn al-Hā’im, with whom both scholars had studied. He then returned to Damascus and continued working on the same book under the tutelage of Tāj al-Dīn Muḥammad ibn Bahādur. Despite his studies, he found arithmetic hard to comprehend, until he came across a treatise on arithmetic and planar geometry written by Aḥmad ibn Yaḥyā ibn Aḥmad al-Shāfi‘ī, which he found much more accessible than the book by Ibn al-Hā’im. He then returned to Quds in Muharram of 833 A.H. (September 1429) and studied this book with Zayn al-Dīn al-Māhir.

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Title in Original Language

اباحة الباحة من علمى الحساب والمساحة

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197 folio pages; 12.5 x 17 centimeters

Last updated: September 22, 2014