Structural Mechanics of Engineering Constructions and BuildingsStructural Mechanics of Engineering Constructions and Buildings1815-52352587-8700Peoples’ Friendship University of Russia named after Patrice Lumumba (RUDN University)2618510.22363/1815-5235-2021-17-1-42-50Research ArticleModeling and visualizing of the formation of a snub dodecahedron in the AutoCAD systemRomanovaVictoryna A.<p>Associate Professor of the Department of Civil Engineering of the Academy of Engineering</p>v.a.r-victoryna@mail.ruStrashnovStanislav V.<p>Associate Professor of the Department of General Education Courses of the Faculty of Russian Language and General Educational Disciplines</p>v.a.r-victoryna@mail.ruPeoples’ Friendship University of Russia (RUDN University)02042021171425002042021Copyright © 2021, Romanova V.A., Strashnov S.V.2021<p style="text-align: justify;">The article is devoted to modeling and visualization of the formation of flat-nosed (snub-nosed) dodecahedron (snub dodecahedron). The purpose of the research is to model the snub dodecahedron (flat-nosed dodecahedron) and visualize the process of its formation. The formation of the faces of the flat-nosed dodecahedron consists in the truncation of the edges and vertices of the Platonic dodecahedron with the subsequent rotation of the new faces around their centers. The values of the truncation of the dodecahedron edges, the angle of rotation of the faces and the length of the edge of the flat-nosed dodecahedron are the parameters of three equations composed as the distances between the vertices of triangles located between the faces of the snub dodecahedron. The solution of these equations was carried out by the method of successive approximations. The results of the calculations were used to create an electronic model of the flat-nosed dodecahedron and visualize its formation. The task was generally achieved in the AutoCAD system using programs in the AutoLISP language. 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