Qhov no yog lub laij lej uas suav qhov ntim ntawm ib lub cuboid, txhawb nqa metric thiab imperial units (inch, taw, yards, mm, cm lossis meter), thiab cov txiaj ntsig ntim tuaj yeem hloov mus rau qhov sib txawv, nrog rau kev suav cov mis thiab dynamic pom lub voos xwmfab, nws pab peb kom tau cov lus teb thiab nkag siab cov txiaj ntsig tau yooj yim dua.
Cuboid yog lub thawv khoom uas nws txhua qhov chaw yog ib daim duab plaub ntawm tib cheeb tsam lossis thaj chaw sib txawv.
Lub cuboid yuav muaj qhov ntev, dav thiab qhov siab.
Volume of a cuboid = (ntev × dav × qhov siab) cubic units.
Nrhiav qhov ntim ntawm lub cuboid ntawm qhov ntev 14 cm × 12 cm × 8 cm.
Yog tias peb xav hloov cov chav nyob ntawm qhov ntim rau hauv cov chav sib txawv, peb tuaj yeem hloov cov chav nyob ntawm qhov ntev mus rau tib lub ntim ua ntej,
piv txwv li,
ib lub voos xwmfab muaj qhov ntev ntawm 12.5 nti, 14 hauv thiab 9.3 nti.
Qhov ntim hauv ft³ yog dab tsi?
Akubyog ib yam khoom zoo li lub thawv. Nws muaj rau lub ntsej muag tiaj tus thiab txhua lub kaum sab xis yog kaum sab xis. Thiab tag nrho nws lub ntsej muag yog duab plaub. Nws kuj yog ib qho prism vim nws muaj tib qhov hla ntu raws qhov ntev. Qhov tseeb nws yog ib lub prism.
Thaum tag nrho peb qhov ntev sib npaug nws hu ua akub(los yog hexahedron) thiab txhua lub ntsej muag yog square. Ib lub voos xwmfab tseem yog prism thiab kuj yog cuboid.