eng Science and Education Publishing American Journal of Applied Mathematics and Statistics 2328-7292 2019-06-04 7 4 120 130 10.12691/ajams-7-4-1 AJAMS2019741 article Joseph Dongho josephdongho@yahoo.fr 1 Siméon Kemmegne Fopossi 1 Department of Mathematics and Computer Science, University of Maroua, Maroua, Cameroon Given a regular Euclidean pyramid with square base, we use basic properties of great circle associated to it sides to prove the existence of its spherical counterpart. We also prove that its homeomorphic to its spherical counterpart. http://pubs.sciepub.com/ajams/7/4/1/ajams-7-4-1.pdf pyramid euclidean pyramid sphere homeomorphism