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Video: Yuav ua li cas koj pom ob sab ntawm daim duab peb sab prism?
2024 Tus sau: Miles Stephen | [email protected]. Kawg hloov kho: 2023-12-15 23:36
Ob qhov kev sib npaug yooj yim tshaj plaws yog:
- ntim = 0.5 * b * h * ntev, qhov twg b yog qhov ntev ntawm lub hauv paus ntawm lub daim duab peb sab , h yog qhov siab ntawm lub daim duab peb sab thiab ntev yog prism ntev.
- area = length * (a + b + c) + (2 * base_area), qhov twg a, b, care sab ntawm daim duab peb sab thiab base_area yog qhov daim duab peb sab puag ncig.
Hais txog qhov no, koj ua li cas thiaj nrhiav tau daim duab peb sab prism?
Qhov ntim ntawm a daim duab peb sab prism tuaj yeem pom bymultiplying lub hauv paus lub sij hawm qhov siab. Ob daim duab ntawm lub Daim duab peb sab prisms hauv qab no qhia tib cov qauv. Theformula, feem ntau, yog thaj tsam ntawm lub hauv paus (liab daim duab peb sab nyob rau hauv daim duab ntawm sab laug) times theheight, h.
Kuj Paub, dab tsi yog tus qauv hauv kev nrhiav qhov ntim ntawm daim duab peb sab prism? Rau ntim ntawm a prism , txoj cai dav dav ismultiply thaj tsam ntawm lub hauv paus los ntawm thaj tsam ntawm qhov siab. Piv txwv li, rau a daim duab peb sab prism , cov ntim yuav yog (1/2) b * h * a yog tias koj teem a = qhov siab ntawm qhov prism thiab h = height of the daim duab peb sab los ntawm qauv (1/2) bh, uas yog thaj tsam ntawm a daim duab peb sab.
Ib sab ntawm qhov no, dab tsi yog sab ntawm daim duab peb sab prism?
Hauv geometry, a daim duab peb sab prism yog peb sab prism ; nws yog ib tug polyhedron ua los ntawm ib tug daim duab peb sab lub hauv paus, daim ntawv txhais lus, thiab 3 lub ntsej muag koom nrog sib xws sab . A txoj cai daim duab peb sab prism muaj duab plaub sab , txwv tsis pub nws yog oblique.
Tus qauv rau ntim yog dab tsi?
Txhua yam prism ntim yog V = BH qhov twg B yog thaj tsam ntawm lub hauv paus thiab H yog qhov siab ntawm prism, yog li nrhiav thaj tsam ntawm lub hauv paus los ntawm B = 1/2h (b1 + b2), ces muab los ntawm qhov siab ntawm lub prism.
Pom zoo:
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