// Copyright (c) 2019-2023 Oracle and/or its affiliates. // Contributed and/or modified by Vissarion Fysikopoulos, on behalf of Oracle // Contributed and/or modified ...

The geometry we learn in school is primarily the geometry of a "plane." The sum of the interior angles of a triangle is $${180^\circ}$$, parallel lines do not intersect, and the shortest distance is a ...