Los ntawm kev qhia koj tus menyuam txog cov duab geometric, koj txhim kho nws txoj kev xav. Nws pib kawm cov tswv yim xws li puag ncig, duab plaub, square, kheej kheej, nyhav. Lo lus "parallelepiped" yog qhov nyuaj tshaj plaws rau ib tug menyuam. Txhawm rau kom paub nws, koj tuaj yeem ua cov duab geometric nrog nws. Ua nws nrog nws tus kheej tes, nws paub nws txoj cai.
Nws yog qhov tsim nyog
- - daim ntawv (tuab txaus, tab sis tsis yog daim ntawv los qhia, kom nws yooj yim dua rau tus menyuam los lis cov khoom siv tes ua), toj roob hauv pes tuab yog qhov zoo dua;
- - txiab;
- - PVA kua nplaum;
- - tus pas ntsuas;
- - xaum.
Cov Lus Qhia
Kauj ruam 1
Ib lub thawv twg muaj peb qho: qhov ntev, qhov dav thiab qhov siab. Ua ntej, koj yuav tsum tau ua tus ntawv hu ua "scan" rau ntawm ib daim ntawv. Ua li no, kos cov duab plaub.
Kauj ruam 2
Kos thawj lub duab plaub (1) uas siv cov lus hais tias “ntev” thiab “dav”. Wb hais tias qhov ntev yog 10 cm, qhov dav yog 3 cm Qhov tshwm sim yog 10x3 duab plaub.
Kauj ruam 3
Tom ntej no, koj yuav tsum kos ob lub duab plaub 2 thiab 3 saum toj thiab hauv qab no, hauv ib sab yuav ua ke nrog lub duab plaub 1 hauv ntev, thiab qhov dav yuav sib npaug zos rau qhov siab. Wb hais tias nws yuav yog 5 cm. Qhov tshwm sim yog 10x5 duab plaub.
Kauj ruam 4
Lub duab plaub 4 muaj ib sab nyob rau hauv ntev uas yog sib koom nrog lub duab plaub 2, thiab qhov dav yog sib npaug rau qhov ntev ntawm lub duab plaub 1. Qhov tshwm sim yog 10x3 duab plaub.
Kauj ruam 5
Cov duab plaub kawg 5 thiab 6 yog qhov qub. Lawv nyob ntawm ob sab ntawm cov duab plaub 1. Lawv qhov dav yog qhov sib npaug ntawm cov duab plaub 1, thiab lawv ntev yog sib npaug nrog qhov siab ntawm parallelepiped. Yog li nws yog 3 x 5 duab plaub.
Kauj Ruam 6
Kos 0.5 cm kua nplaum tso cai rau ntawm cov duab plaub 3, 5 thiab 6. Tus qauv ca yog npaj txhij. Nws yog ib qho tseem ceeb uas txhua cov ntsiab lus raug ntsuas nruj me ntsis thiab khiav ua ke, txwv tsis pub daim duab yuav tsis lo ua ke raws nraim thiab yuav muaj qhov tsis zoo.
Kauj Ruam 7
Txiav tawm cov qauv tiaj tus. Nias cov quav nrog lub blunt kawg ntawm txiab, mam li khoov. Muab cov duab kos nrog zoo huv si siv cov nyiaj pab. Nthuav lawv nrog kev ywj pheej ntau kom cov duab tsis poob sib nrug.
