Ibrahim ibn Sinan ibn Thabit.
Another important contribution Thabit made to geometry was his generalization of the Pythagorean theorem,
In mathematics, Alhazen built on the mathematical works of Euclid and Thabit ibn Qurra
For example, Ibrahim ibn Sinan and his grandfather Thabit ibn Qurra both studied curves required in the construction of sundials.
In mathematics, Alhazen built on the mathematical works of Euclid and Thabit ibn Qurra
and worked on"the beginnings of the link between algebra and geometry.
While some of which are considered to be of a lesser quality and lacking authenticity,
the most serious of those are the ones by Hassan ibn Thabit.
Another important contribution Thabit made to geometry was his generalization of the Pythagorean theorem,
which he extended from special right triangles to all triangles in general, along with a general proof.
Ibrahim ibn Sinan ibn Thabit(born 908),
who introduced a method of integration more general than that of Archimedes, and al-Quhi(born 940) were leading figures in a revival and continuation of Greek higher geometry in the Islamic world.