Ptolemy (85 - 165) - Biography - MacTutor History of Mathematics

Ptolemy was the most influential of Greek astronomers and geographers of his time. He propounded the geocentric theory of the solar system that prevailed for 1400 years.

Claudius Ptolemy - Biography, Facts and Pictures

Ptolemy - Math Open Reference

Euclid (325 BC - 265 BC) - Biography - MacTutor History of Mathematics

Ptolemy, Accomplishments, Biography, & Facts

Claudius Ptolemy: The Mathematics of Celestial Motion

Ptolemy (85 - 165) - Biography - MacTutor History of Mathematics

Claudius Ptolemy: The Mathematics of Celestial Motion

Euclid (325 BC - 265 BC) - Biography - MacTutor History of Mathematics

Claudius Ptolemy - Biography, Facts and Pictures

Ibn al-Haytham - Wikipedia

Early Proofs of the Pythagorean Theorem by Leonardo Da Vinci, Ptolemy, Thabit ibn Qurra, and Garfield - Owlcation

MYSTERIES OF THE EQUILATERAL TRIANGLE - HIKARI Ltd

Claudius Ptolemy : Greek Mathematician, Astronomer » Vedic Math School