Who is considered the father of modern geometry?

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

Answer: (B)

Geometry becomes a rigorous, deductive science when built from definitions, postulates, and logical proofs. Euclid, whose Elements organized geometry around a concise set of axioms and postulates, showed how a wide range of theorems can be derived step by step from these basics. This systematic, proof-based method is what we associate with modern geometry and it set the standard for how the subject is studied for centuries. Earlier contributors laid important groundwork—Thales introduced early deductive reasoning, Pythagoras gave famous theorems, Archimedes expanded geometric methods—but Euclid’s formal, axiomatic framework is what earned him the title of the father of modern geometry.