Ib kab segment zoo li cas?
Ib kab segment zoo li cas?

Video: Ib kab segment zoo li cas?

Video: Ib kab segment zoo li cas?
Video: txhob hnov qab kuv lub npe - Bee lee [Official MV] 2022-23 2024, Kaum ib hlis
Anonim

A kab ntu yuav muaj ob lub ntsiab lus kawg txhais tau hais tias nws muaj peev xwm muaj qhov ntev ntev ntawm qhov ntu , muab ib chav tsev ntu . Yog ncaj kab muaj 1 qhov kawg, peb hu ua ray, uas zoo li muaj ib kab emanating ntawm ib qho tsis muaj qhov kawg. Yog ncaj kab muaj 2 qhov kawg, peb hu nws a kab ntu.

Kuj paub, kab thiab kab ntu yog dab tsi?

Hauv geometry, a kab ntu yog ib feem ntawm a kab uas yog bounded los ntawm ob qhov kawg cov ntsiab lus, thiab muaj txhua lub ntsiab lus ntawm lub kab nruab nrab ntawm nws qhov kawg. Ib kaw kab ntu suav nrog ob qho kawg, thaum qhib kab ntu cais ob qhov kawg; ib nrab qhib kab ntu suav nrog raws nraim ib qho ntawm qhov kawg.

Ib yam li ntawd, kab kab ntu thiab Ray hauv lej yog dab tsi? A kab ntu muaj ob qhov kawg. Nws muaj cov ntsiab lus kawg no thiab tag nrho cov ntsiab lus ntawm cov kab nruab nrab ntawm lawv. Koj tuaj yeem ntsuas qhov ntev ntawm a ntu , tab sis tsis yog ib kab . A ray yog ib feem ntawm a kab uas muaj ib qho kawg thiab mus rau infinitely nyob rau hauv ib qho kev taw qhia xwb. Koj tsis tuaj yeem ntsuas qhov ntev ntawm a ray.

Ntxiv mus, lub ray zoo li cas?

Ib kab yog cov ntsiab lus ncaj nraim uas txuas mus rau qhov sib txawv ntawm qhov tsis muaj qhov xaus. A ray yog ib feem ntawm txoj kab uas muaj ib qho kawg thiab txuas mus rau ib qho kev taw qhia yam tsis muaj qhov xaus. Ib kab ntu yog ib feem ntawm kab ntawm ob qhov kawg.

Koj txhais kab li cas?

A kab txhais tau tias yog a kab ntawm cov ntsiab lus uas nthuav infinitely nyob rau hauv ob txoj kev. Nws muaj ib qhov ntev, ntev. Cov ntsiab lus uas nyob rau tib yam kab hu ua collinear point. A kab yog txhais los ntawm ob lub ntsiab lus thiab yog sau raws li qhia hauv qab no nrog ib tug xub taub hau.

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