Cov cai ntawm geometry, qhia hauv cov lus thiab cov qauv, feem ntau nyuaj nkag siab. Yog tias peb txhais lawv rau hauv qhov chaw nyob ntawm cov khoom, ua rau lawv pom, cov menyuam kawm ntawv yuav xam tau txhua yam theorems thiab axioms. Cov txheej txheem ntawm cov duab geometric ua los ntawm cov ntawv tuaj yeem pab nrog qhov no.
Nws yog qhov tsim nyog
- - ntawv;
- - tus pas ntsuas;
- - xaum;
- - txiab;
- - kua nplaum.
Cov Lus Qhia
Kauj ruam 1
Txhawm rau ua kom muaj cov duab plaub sib npaug ntawm daim ntawv, koj yuav tsum xub nco nws yog dab tsi. Cov duab no muaj 6 lub ntsej muag, thiab txhua lub ntsej muag yog duab plaub. Yog li ntawd, txoj kev sib txig sib law sib luag yuav muaj 6 lub duab plaub nyob hauv tib lub dav hlau thiab txuas nrog txhua lwm.
Kauj ruam 2
Txiav txim siab qhov xav tau qhov loj me ntawm daim duab. Sau qhov tseem ceeb rau nws peb qhov ntev - ntev, dav thiab qhov siab.
Kauj ruam 3
Xaiv ntawv rau qhov ua kom sib haum sib pab. Ib qho me me heev yuav tsis ua haujlwm - nws yuav warp ntau dhau los ntawm kua nplaum thiab fray sai sai. Daim duab tes yuav ua tau tuab heev - nws yuav tsis khoov zoo lossis tawg ntawm cov quav. Dej ntawv xim dej yog qhov zoo tshaj.
Kauj ruam 4
Kos kab kab tav toj rau ntawm daim ntawv. Nws qhov ntev yog sib npaug ntawm cov tawm ntawm qhov ntev thiab dav, sib npaug ntawm ob. Los ntawm ob qho kawg ntawm txoj kab, txiav tawm mus rau sab hauv qab, teem txoj kab sib luag kom sib luag nrog qhov siab ntawm txoj hlua sib luag. Kos ib txoj kab nruab nrab ntawm cov ntu sib npaug thiab mus tib seem rau thawj kab rov tav.
Kauj ruam 5
Los ntawm sab saud sab xis ntawm lub duab plaub, teem ib sab raws lub ntsej muag rau cov naj npawb ntawm centimeters sib npaug rau qhov dav ntawm daim duab, thiab tom qab ntawd ib ntu sib npaug nrog qhov ntev ntawm tus parallelepiped. Tom qab ntawd, qhov dav thiab ntev dua. Kos cov kab sib tshuam los ntawm cov ntsiab lus no (qis mus rau sab nraud).
Kauj Ruam 6
Los ntawm qaum sab laug ntawm plaub sib dhos, teem rau qhov dav ntawm lub duab plaub parallelepiped, los ntawm qhov kawg ntawm ntu no mus rau sab xis - qhov ntev, thiab tom qab ntawd txiav mus rau hauv qab - dua qhov dav. Kos lub ntsej muag zoo tib yam sab tom qab sib tw ntawm tus duab plaub, pib ntawm nws sab laug qhov kawg ntawm kab ntawv.
Kauj Ruam 7
Ua kom gluing daim duab yooj yim dua, li qub tuaj yeem muab hauv cov duab kos. Kos lub voos plaub nqaim 1, 5 cm dav rau sab ntug heev, txiav nws sab saud ntawm kaum ntawm 45 degrees. Txuas peb lub qub ntawm tib yam rau qee yam, kev tsim kho ntawm qhov tau piav qhia hauv kab lus 6.
Kauj ruam 8
Txiav tawm qhov chaw ua haujlwm thiab khoov nws raws txhua kab kos kom lub ntsej muag tig mus rau sab, thiab sab saud thiab qis ua rau "hauv qab" thiab "npog" ntawm parallelepiped. Npog li qub nrog kua nplaum thiab ntxig sab hauv. Tom qab cov kua nplaum tau qhuav, cov qauv kos duab tuaj yeem siv tau.
