Answer:
In geometry, Ibn al-Haytham developed analytical geometry by establishing the linkage between algebra and geometry. Ibn al-Haytham also discovered a formula for adding the first 100 natural numbers. His contributions to number theory include his work on perfect numbers.
Works written: Book of Optics, Treatise on Light, ...
Place of death: Cairo, Egypt
Inventions: Pinhole camera
Profession: Scholar, Author