Cov txheej txheem:

Dab tsi yog cov duab zoo hauv geometry?
Dab tsi yog cov duab zoo hauv geometry?

Video: Dab tsi yog cov duab zoo hauv geometry?

Video: Dab tsi yog cov duab zoo hauv geometry?
Video: yog hmoov dab tsi. Zoo Xyooj (cover) 2024, Kaum ib hlis
Anonim

Cov duab khov yog peb-dimensional cov duab uas muaj qhov ntev, dav thiab qhov siab. Saib qee qhov piv txwv ntawm peb-dimensional cov duab hauv qab no. Lub prism yog ib tug polyhedron nrog raws nraim ob lub ntsej muag uas yog congruent thiab parallel. Cov ntsej muag no hu ua lub hauv paus. Lwm lub ntsej muag hu ua lateral faces.

Ib yam li ntawd, cov piv txwv ntawm cov duab zoo li cas?

Qee qhov piv txwv ntawm cov duab zoo : Lub khob hliav qab, Cuboid, Sphere, Lub tog raj kheej, lub voos xwmfab. Lub voos xwmfab muaj 6 lub ntsej muag uas sib npaug squares, 12 cov npoo sib npaug thiab 8 vertices. Cuboid muaj 6 lub ntsej muag lub ntsej muag uas lub ntsej muag sib npaug sib npaug.

Ib tug kuj yuav nug, qhov txawv ntawm lub dav hlau cov duab thiab cov duab khoom yog dab tsi? A dav hlau daim duab yog ob-dimensional, thiab a daim duab yog peb-dimensional. Cov qhov sib txawv ntawm lub dav hlau thiab cov duab khov yog nyob rau hauv lawv qhov ntev. Qhov twg ib square yog a dav hlau daim duab , nws 3D counterpart, lub voos xwmfab, yog a daim duab.

Ib yam li ntawd, muaj pes tsawg hom ntawm cov khoom muaj nqis?

yam chaw uas peb nyob

  • Peb Dimensions. Nws yog hu ua peb-dimensional,
  • Tej yam yooj yim. Cia peb pib nrog qee cov duab yooj yim tshaj plaws:
  • Cov khoom. Cov khoom muaj cov khoom (tshwj xeeb txog lawv), xws li:
  • Polyhedra thiab Non-Polyhedra. Muaj ob lub ntsiab ntawm cov khib nyiab, "Polyhedra", thiab "Non-Polyhedra":

Cov khoom yog dab tsi?

A khov kho yog tus yam ntxwv los ntawm cov qauv rigidity thiab tsis kam mus rau lub zog siv rau saum npoo. Tsis zoo li kua, a khoom khoom tsis ntws mus rau hauv cov duab ntawm nws lub thawv, thiab nws tsis nthuav mus sau tag nrho cov ntim muaj xws li roj.

Pom zoo: