Hauv geometry, ib qho icosahedron yog polyhedron nrog 20 lub ntsej muag. Lub npe los ntawm Ancient Greek εἴκοσι 'nees nkaum' thiab los ntawm Ancient Greek ἕδρα 'lub rooj'. Cov plural tuaj yeem yog "icosahedra" lossis "icosahedrons". Muaj ntau infinitely ntau yam tsis zoo sib xws ntawm icosahedra, ib txhia ntawm lawv ua ntau symmetrical dua lwm tus.
Icosahedron muaj pes tsawg lub ntsej muag?
Lub 20 ntsej muag ntawm icosahedron yog daim duab peb sab sib npaug; lawv sib ntsib hauv 30 ntug thiab 12 vertices.
Tus zoo li 20 lub ntsej muag hu li cas?
In geometry, an icosahedron (/ˌaɪkɒsəˈhiːdrən, -kə-, -koʊ-/ or /aɪˌkɒsəˈhiːdrən/) yog polyhedron nrog 20 lub ntsej muag. … Qhov paub zoo tshaj plaws yog (convex, non-stellated) tsis tu ncua icosahedron-ib qho ntawm Platonic solids-uas lub ntsej muag yog 20 daim duab peb sab sib npaug.
Icosahedron zoo li cas?
Icosahedron yog polyhedron (3-D duab nrog tiaj tus) uas muaj 20 lub ntsej muag, los yog tiaj tus. Nws muaj 12 vertices (cov ces kaum) thiab 30 ntug, thiab 20 lub ntsej muag ntawm lub icosahedron yog daim duab peb sab sib npaug.
Rhombicosidodecahedron muaj pes tsawg lub ntsej muag?
Rhombicosidodecahedron muaj 62 lub ntsej muag ua los ntawm 20 hexagons ib txwm, 30 squares, thiab 12 tsis tu ncua decagons. Nws kuj muaj 120 vertices thiab 180 npoo.
