Hauv kev tshaj tawm no, peb yuav xav txog cov ntsiab lus, cov ntsiab lus, hom thiab cov khoom tseem ceeb ntawm parallelepiped, incl. duab plaub. Cov ntaub ntawv nthuav tawm yog nrog rau cov duab kos duab kom pom kev zoo dua.
Txhais lub thawv
Parallelpiped yog ib daim duab geometric hauv qhov chaw; ib tug hexagon uas nws lub ntsej muag yog parallelograms. Daim duab muaj 12 ntug thiab 6 lub ntsej muag.
Ib tug parallelepiped yog ntau yam nrog ib tug parallelogram raws li hauv paus. Cov ntsiab lus tseem ceeb ntawm daim duab yog tib yam li cov prism.
Nco ntsoov: Cov qauv rau kev suav (rau lub duab plaub) thiab ib qho parallelepiped tau nthuav tawm hauv cov ntawv luam tawm cais.
Hom ntawm parallelepipeds
- Ncaj parallelepiped - Sab ntsej muag ntawm daim duab yog perpendicular rau nws cov hauv paus thiab yog cov duab plaub.
- Txoj cai parallelepiped tuaj yeem ua tau duab plaub Cov hauv paus yog cov duab plaub.
- Oblique parallelepiped - Sab ntsej muag tsis yog perpendicular rau lub hauv paus.
- - Txhua sab ntawm daim duab yog cov squares sib npaug.
- Yog hais tias tag nrho cov ntsej muag ntawm ib tug parallelepiped yog zoo tib yam rhombuses, nws yog hu ua rhombohedron.
Box khoom
1. Cov ntsej muag tawm tsam ntawm ib qho parallelepiped yog sib npaug sib npaug thiab sib npaug sib npaug.
2. Tag nrho cov kab pheeb ces kaum ntawm parallelepiped sib tshuam ntawm ib qho chaw thiab muab faib ua ib nrab ntawm nws.
3. Square kab pheeb ces kaum (D) ntawm ib daim duab plaub parallelepiped yog sib npaug rau cov lej ntawm cov squares ntawm nws peb qhov ntev: qhov ntev (A), dav (B) thiab qhov siab (C).
d2 =A2 + b2 +c2
Nco ntsoov: mus rau parallelepiped, kuj siv.