EntityQ5420776· pop 7· linked from 77 articlesexpansionSign in to saveoperation on a polytope where facets are separated and moved radially apart, and new facets are formed at separated elementsConnectionsfaceEntityHarold Scott MacDonald CoxeterEntitytruncationEntityfacetEntitycantellationEntitybitruncationEntitygeometryEntityInternational Standard Book NumberEntitypolygonEntitycubeEntitypentagonEntitydimensionEntitypolyhedronEntitydecagonEntityvertexEntityoctahedronEntityedgeEntityMathWorldEntitypolytopeEntityEric W. WeissteinEntityCategoriesEuclidean geometryPolytopes