EntityQ2533936· pop 12· linked from 42 articlesdefectSign in to savefailure of some angles to add up to the expected amount of 360° or 180°, when such angles in the plane wouldConnectionspolyhedronEntityspherical trigonometryEntityfaceEntityRené DescartesEntitygeometryEntityangleEntitycubeEntitydigital object identifierEntitypentagonEntityplaneEntitytetrahedronEntityJSTOREntityPlatonic solidEntitydodecahedronEntitymaxima and minimaEntityoctahedronEntityhomeomorphismEntityicosahedronEntityDirac delta functionEntityEuler characteristicEntityCategoriesHyperbolic geometryPolyhedra