2024 Tus sau: Elizabeth Oswald | [email protected]. Kawg hloov kho: 2024-01-13 00:07
Ib lub prism yog ib daim duab peb sab, muaj rau lub ntsej muag, qhov twg tag nrho lub ntsej muag (sab saum toj, hauv qab, thiab sab nraud) ntawm lub ntsej muag yog cov duab plaub zoo li txhua tus ob lub ntsej muag opposite sab yog tib yam. Zoo li tag nrho cov duab peb sab, lub duab plaub kuj muaj qhov ntim thiab qhov chaw saum npoo.
Cov lus twg tuaj yeem siv los piav txog lub kaum sab xis?
Ib yam khoom (3-dimensional) uas muaj rau lub ntsej muag uas yog duab plaub. Nws muaj tib qhov hla ntu raws qhov ntev, uas ua rau nws muaj prism. Nws tseem yog "cuboid".
Dab tsi piav txog lub duab plaub?
1: zoo li ib daim duab plaub ib cheeb tsam. 2a: hla, dag, lossis kev sib ntsib ntawm lub kaum sab xis ntawm lub kaum sab xis. b: muaj cov npoo, qhov chaw, lossis cov ntsej muag uas sib ntsib ntawm cov ces kaum sab xis: muaj lub ntsej muag lossis cov npoo zoo li cov duab plaub sib npaug sib npaug ntawm cov duab plaub.
Ib qho piv txwv ntawm lub prism yog dab tsi?
Right rectangular prisms or cuboids are all around us. Qee qhov piv txwv yog phau ntawv, thawv, tsev, cib, boards, qhov rooj, thawv, txee, mobiles, thiab laptops. Tsis yog piv txwv ntawm txoj cai prism: Cov duab no yog prism tab sis nws sab saum toj thiab hauv paus tsis muaj cov kaum sab xis hauv cov duab.
Puas yog lub voj voos prism tiaj tus lossis nkhaus?
Muaj 3D cov duab uas tsuas muaj qhov chaw tiaj tus. Piv txwv li, lub voos xwmfab, cuboid, pyramid thiab prism yog tag nrho cov duab 3D uas yog tsim los ntawmtiaj tus. Lawv qhov chaw yog squares, rectangles, triangles thiab parallelograms. Tsis muaj leej twg muaj qhov nkhaus.
Pom zoo:
Puas yog kab pheeb ces kaum txiav lub kaum sab xis ib nrab?
Txhua kab pheeb ces kaum faib ib lub ces kaum mus rau ob lub ces kaum. Nco ntsoov tias cov kab pheeb ces kaum sib npaug thiab txiav ib nrab ntawm cov ces kaum sab xis. Puas diagonal bisect an angle? kab pheeb ces kaum bisect the angles.
Lub kaum sab xis twg tuaj yeem tsim daim duab peb sab?
Daim duab peb sab kuj tuaj yeem raug cais los ntawm lawv cov kaum. Hauv daim duab peb sab mob daim duab peb sab tag nrho peb lub kaum sab xis yog mob (tsawg dua 90 degrees). Daim duab peb sab txoj cai muaj ib lub kaum sab xis thiab ob lub kaum sab xis.
Yuav tso lub projectile ntawm lub kaum sab xis?
Higer launch angles muaj siab tshaj qhov siab Qhov siab tshaj plaws yog txiav txim los ntawm qhov pib ntsug tshaj tawm. Txij li cov kaum sab xis tshaj tawm muaj qhov loj dua ntsug qhov sib txuas, ua kom lub kaum sab xis tso tawm nce qhov siab tshaj plaws.
Lub kaum sab xis yog daim duab peb sab?
Triangle angle sum theorem: Qhov no hais tias cov lej ntawm tag nrho peb lub kaum sab hauv sab hauv Lub kaum sab xis Nyob rau hauv geometry, lub kaum sab hauv ntawm daim duab peb sab yog cov kaum sab xis uas tsim hauv daim duab peb sab. Cov ces kaum sab hauv muaj cov khoom nram qab no:
Lub pob cue yuav deflected ntawm lub kaum sab xis twg?
Ntev npaum li lub pob cue dov (piv txwv li, tsis zawv zawg) ntawm qhov cuam tshuam ntawm cov khoom, lub pob cue yuav raug deflected los ntawm ze rau 30 degrees rau kev txiav cov ces kaum xws li ntawm 1/4-pob ntaus mus rau 3/4 pob ntaus (saib daim duab 2).
