Video: Kab kab ntu thiab Ray yog dab tsi?
2024 Tus sau: Miles Stephen | [email protected]. Kawg hloov kho: 2023-12-15 23:36
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.
Tsuas yog li ntawd, kab thiab kab 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 hauv geometry yog dab tsi? Ib point in geometry yog qhov chaw. Nws tsis muaj qhov loj me piv txwv li tsis dav, tsis ntev thiab tsis tob. Ib tug taw tes qhia los ntawm ib tug dot. A kab txhais tau tias yog a kab ntawm cov ntsiab lus uas nthuav infinitely nyob rau hauv ob txoj kev. Ob kab uas sib ntsib hauv ib lub ntsiab lus yog hu ua kev sib tshuam kab.
Tsis tas li ntawd, lub ray kab ntu thiab lub kaum sab xis yog dab tsi?
A kab uas muaj ib lub ntsiab lus kawg yog hu ua a ray thiab txuas mus tas li nyob rau hauv ib qho kev taw qhia. A ray muaj npe tom qab qhov kawg thiab lwm qhov taw qhia ntawm tus ray e.g. → AB. Cov lub kaum sab xis uas yog tsim los ntawm ob rays nrog tib qhov kawg yog ntsuas hauv degrees.
Ib kab kab piv txwv yog dab tsi?
Kev txhais ntawm a Kab Seg A kab ntu yog ib feem, lossis ib feem, ntawm a kab hauv geometry. A kab ntu yog sawv cev los ntawm cov ntsiab lus kawg ntawm txhua qhov kawg ntawm qhov kab ntu . Rau piv txwv , yog tias koj cov ntsiab lus kawg yog A thiab B, ces koj yuav sau koj li kab ntu AB a kab saum toj.
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