Lub khob hliav qab puas yog pyramid?
Lub khob hliav qab puas yog pyramid?

Video: Lub khob hliav qab puas yog pyramid?

Video: Lub khob hliav qab puas yog pyramid?
Video: Yuav ua li cas thiaj khiav dim lub ntiajteb no 2024, Kaum ib hlis
Anonim

A khob khob nrog lub hauv paus polygonal hu ua a pyramid . Nyob ntawm cov ntsiab lus, " khob khob " kuj tseem txhais tau hais tias ib qho convex khob khob los yog projective khob khob . Cones kuj tuaj yeem ua tau dav dav rau qhov siab dua.

Kuj paub, yog lub khob hliav qab lub pyramid muaj lossis tsis yog?

Kuv nkag siab tias a pyramid yog ib rooj plaub tshwj xeeb ntawm a khob khob thiab yog li koj tuaj yeem xa mus rau a pyramid as a khob khob tab sis tsis yog lwm txoj hauv kev. Hauv kev siv ntau, lo lus khob khob hais txog lub voj voog txoj cai khob khob ,qus a khob khob nws lub hauv paus yog lub voj voog thiab nws qhov vertex ncaj qha saum toj lossis hauv qab ntawm qhov nruab nrab ntawm lub voj voog.

Tsis tas li ntawd, pyramids thiab cones txawv li cas? Txoj cai ncig khob khob yog ib ncig khob khob uas nws qhov siab sib tshuam lub dav hlau ntawm lub voj voog ntawm lub voj voog qhov chaw. Nws yog ib qho yooj yim kom pom kev sib raug zoo ntawm pyramids thiab cones . Lub xwb txawv yog thebase--a pyramid yog a khob khob nrog polygonalbase.

Kuj tseem paub, yog lub khob hliav qab lossis prism?

A khob khob yog ib qho khoom peb-dimensional nrog ib puag ncig puag ncig thiab ib sab nkhaus uas sib ntsib ntawm ib qho chaw. Ib qho piv txwv zoo ntawm a khob khob yog ice cream khob khob . Kev sib txuas ntawm lub tog raj kheej thiab a khob khob zoo ib yam li kev sib txuas ntawm a pyramid thiab a prism.

Puas yog lub voos xwmfab pyramid?

Hauv kev ua lej, prism yog ib qho polyhedron uas yog ua los ntawm cov kab sib txuas saum toj kawg nkaus hauv qab thiab cov duab plaub sab. Pyramids haveone puag thiab daim duab peb sab sab ntsej muag, uas sib ntsib ntawm lub hauv paus vertexpoint. Ib dice or kub yog ib qho piv txwv ntawm prism.

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