Elements of Euclidean Geometry

This lecture covers the introduction to the Elements of Euclid, the concept of propositions, the absence of unit of measure, invariance of distance, and the hyperboloid surface. It also explores the tractricoid, a model of non-Euclidean geometry, and the projective geometry. The lecture delves into the historical context and mathematical concepts behind Euclidean and non-Euclidean geometries.