Example image of eyePlorer eyePlorer map for 'Euclidean geometry': Alexandria Euclid Greek mathematics Euclid's Elements Geometry Axiom Proposition Theorem Formal system Axiomatic system Mathematical proof Plane geometry Secondary school Dimension Solid geometry Algebra Number theory Consistency Non-Euclidean geometry Albert Einstein Euclidean space General relativity Gravitation Pythagorean theorem Irrational number Prime number Rational number Line (geometry) Point (geometry) Line segment Circle Parallel postulate Constructive proof Compass and straightedge constructions Set theory Scientific modelling Existence theorem Proof by contradiction Real line Congruence (geometry) Similarity (geometry) Complementary angles Supplementary angles Degree (angle) Radian Ray Pons asinorum Thales Archimedes Orange (fruit)