Teb cov lus teb ib kauj ruam dhau los: Polyhedron: Daim duab peb sab uas nws lub ntsej muag yog txhua tus polygons. Lub polyhedron yuav tsum muaj tsawg kawg yog plaub lub ntsej muag. (i) Tsis yog, ib lub polyhedron tsis tuaj yeem muaj 3 daim duab peb sab rau nws lub ntsej muag.
Puas yog polyhedron muaj 4 lub ntsej muag?
(iii) Yog, Ib pyramid tuaj yeem muaj lub ntsej muag square puag thiab 4 daim duab peb sab ntsej muag.
Yuav 3 daim duab peb sab ua ib lub polyhedron?
Teb: Kev xaiv (a) yuav tsis tsim lub polyhedronvim nws yuav tsum muaj ntau tshaj plaub lub ntsej muag. Yog li, nws tsis tuaj yeem ua 3 daim duab peb sab uas muaj 3 lub ntsej muag nkaus xwb. … Cov khoom yog ua los ntawm polygonal cheeb tsam hu ua lub ntsej muag thiab cov ntsej muag sib ntsib ntawm cov npoo hu ua kab ntu thiab cov npoo sib ntsib ntawm cov kab saum toj yog hu ua taw tes.
Puas yog polyhedron muaj 5 lub ntsej muag?
In geometry, a pentahedron (plural: pentahedra) yog polyhedron nrog tsib lub ntsej muag lossis ob sab. … Nrog lub ntsej muag polygon tsis tu ncua, ob daim ntawv topological yog cov square pyramid thiab daim duab peb sab prism.
Pyramid hexagonal zoo li cas?
Ib hexagonal pyramid yog 3D zoo li tus pyramid uas muaj puag zoo li lub hexagon nrog rau ob sab lossis ntsej muag hauv cov duab peb sab isosceles uas tsim lub hexagonal pyramid ntawm lub apex los yog sab saum toj ntawm lub pyramid. Lub pyramid hexagonal muaj lub hauv paus nrog 6 sab nrog rau 6 isosceles daim duab peb sab ntawm lub ntsej muag.
