Which Greek mathematician is recognized as the father of geometry?

• A. Archimedes
• B. Thales
• C. Pythagoras
• D. Euclid

Answer: (D)

Systematizing geometry into a rigorous deductive framework is what this item highlights. Euclid earned the title of the father of geometry because he organized geometric knowledge into a single, coherent system in the Elements. He begins with definitions, axioms (postulates), and common notions, then derives hundreds of theorems through logical proofs, creating a foundational blueprint for geometry that endured for centuries. While Thales contributed early deductive reasoning and geometry, and Pythagoras and Archimedes made crucial geometric advances, Euclid’s formal axiomatic approach set geometry on a lasting, teachable course.