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).
Puas muaj pes tsawg sab dodecahedron muaj?
Ib lub dodecahedron ib txwm muaj 12 tsis tu ncua pentagonal sab.
Dab tsi yog 20 sab 3D duab hu ua?
Lub convex li niaj zaus icosahedron feem ntau yog hu ua yooj yim raws li cov icosahedron li niaj zaus, yog ib qho ntawm tsib cov platonic cov khib nyiab, thiab yog sawv cev los ntawm nws cov cim Schläfli {3, 5}, muaj 20 daim duab peb sab, nrog 5 lub ntsej muag sib ntsib nyob ib ncig ntawm txhua qhov vertex.
20 sab tsuav hu ua dab tsi?
The icosahedron - 20-sided polyhedron - yog nquag. Feem ntau txhua lub ntsej muag ntawm kev tuag yog sau nrog tus lej hauv Greek thiab / lossis Latin txog rau tus lej ntawm lub ntsej muag ntawm polyhedron.
100 sided 3D duab hu li cas?
Zocchihedron yog lub cim lag luam ntawm 100-sided tuag tsim los ntawm Lou Zocchi, uas tau nthuav tawm hauv xyoo 1985. Tsis yog ib lub polyhedron, nws zoo li lub pob nrog 100 flattened. dav hlau. Nws yog qee zaum hu ua "Zocchi's Golfball ".
