Ib txwm dodecahedron muaj 12 lub ntsej muag thiab 20 vertices, whereas ib txwm icosahedron muaj 20 lub ntsej muag thiab 12 vertices. Ob leeg muaj 30 ntug.
Dab tsi tshwj xeeb ntawm dodecahedron?
Thaum cov dodecahedron ib txwm muaj ntau yam nta nrog lwm cov khoom Platonic, ib qho khoom tshwj xeeb ntawm nws yog ib tus tuaj yeem pib ntawm kaum ntawm qhov chaw thiab kos tus lej tsis kawg ntawm txoj kab ncaj nraim hla daim duab uas rov qab mus rau qhov qub yam tsis tau hla lwm lub ces kaum
Puas muaj pes tsawg sab muaj dodecahedron tau?
Los ntawm sab laug mus rau sab xis cov khib nyiab yog tetrahedron (plaub sab), lub voos xwmfab (rau sab), octahedron (yim lub ntsej muag), dodecahedron ( kaum ob lub ntsej muag), thiab icosahedron (nees nkaum. ntsej muag).
Dodecahedron tau nws lub npe li cas?
Nws yog ib qho ntawm yim qhov tsis tu ncua convex deltathedra. Nws tau muab lub npe ntawd los ntawm Norman Johnson vim tias koj tuaj yeem tsim nws los ntawm kev sib cais cov disphenoid rau hauv ob ntu (ntawm ob lub ntsej muag; sphenoid yog Greek rau wedge)thiab tom qab ntawd rov txuas lawv ntawm ib pawg ntawm "snub" triangles.
Puas yog dodecahedron yog Platonic khoom?
Platonic solid, ib qho ntawm tsib geometric cov khoom uas nws lub ntsej muag yog txhua yam zoo tib yam, tsis tu ncua polygons sib ntsib ntawm tib lub kaum sab xis peb sab. Kuj tseem hu ua tsib polyhedra tsis tu ncua, lawv muaj tetrahedron (los yog pyramid), lub voos xwmfab, octahedron, dodecahedron, thiab icosahedron.
