Webinar on the Mystery of a Lost Angles Manuscript

The Webinar on the Mystery of a Lost Angles Manuscript took place on Wednesday, November 18th, 2020 from 7 pm until 8 pm, with Leonardo Martinez, Professor of Mathematics at the National Autonomous University of Mexico (UNAM), as our invited speaker. This virtual event was free and open to the general public.

The invited speaker started the virtual event by telling the story of a lost manuscript that involved Descartes and Leibniz. Leonardo Martinez presented on the sum of the internal angles and the sum of the external angles of a flat polygon and then moved on to talk about polyhedra. The speaker also defined the concept of the defect at a vertex of a polyhedron and ended by connecting these ideas with the geometry in the sphere and the Gauss-Bonet Theorem.