Lub cim rau Ray yog dab tsi?

Cov txheej txheem:

Kab, Ntu, thiab Rays

Video: Lub cim rau Ray yog dab tsi?

2024 Tus sau: Miles Stephen | [email protected]. Kawg hloov kho: 2023-12-15 23:36

A ray kuj yog ib qho ntawm ib kab, tshwj tsis yog tias nws tsuas muaj ib qho kawg nkaus thiab txuas ntxiv mus ib txhis hauv ib qho kev taw qhia. Nws tuaj yeem xav tias yog ib nrab kab nrog qhov kawg. Nws muaj npe los ntawm tsab ntawv ntawm nws qhov kawg thiab lwm yam ntsiab lus ntawm tus ray . Cov cim → sau rau saum ob tsab ntawv yog siv los qhia qhov ntawd ray.

Ib yam li ntawd, tej zaum koj yuav nug, dab tsi yog lub cim rau cov kab sib txuas?

Ob kab , ob qho tib si nyob rau hauv tib lub dav hlau, uas yeej tsis sib tshuam yog hu ua kab sib npaug . Parallel kab nyob sib nrug deb ntawm txhua lub sijhawm. Cov cim // yog siv los qhia kab sib npaug.

Kuj Paub, ua cas || txhais li cas hauv geometry? “|x|” ua tau txhais tau tias "tus nqi tseeb ntawm x" hauv algebra. “AB || CD" tau txhais tau tias "kab ntu AC yog parallel rau kab ntu BC" hauv geometry.

Ib yam li ntawd, nws nug, koj sau Ray li cas?

Kab, Ntu, thiab Rays

Ib kab tuaj yeem hu ua siv ob lub ntsiab lus ntawm kab (piv txwv li, ↔AB) lossis yooj yim los ntawm tsab ntawv, feem ntau yog tus lej me (piv txwv li, kab m).
Ib ntu muaj npe los ntawm nws ob qhov kawg, piv txwv li, ¯AB.
Ib txoj kab hluav taws xob muaj npe siv nws qhov kawg ua ntej, thiab tom qab ntawd lwm qhov taw qhia ntawm txoj kab hluav taws xob (piv txwv li, → BA).

Dab tsi yog lub cim rau lub dav hlau hauv geometry?

Lub teeb grey cim uas zoo li ib lub thawv nyias heev sawv cev rau ib dav hlau . Xav txog qhov dav hlau kom nyias nyias li ua tau. Txawm tias cov dav hlau zoo li daim duab plaub thiab zoo li muaj ntug, xav txog tias nws txuas ntxiv raws li qhov chaw tiaj tus mus ib txhis. A dav hlau yuav raug hu ua ob qhov seem hauv geometry.

Pom zoo:

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Dab tsi yog lub cim atomic rau ib lub atom nrog 82 protons thiab 125 neutrons?

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