Cov txheej txheem:

Vim li cas thiaj tseem ceeb rau kev kawm thaj tsam thiab ib puag ncig?
Vim li cas thiaj tseem ceeb rau kev kawm thaj tsam thiab ib puag ncig?

Video: Vim li cas thiaj tseem ceeb rau kev kawm thaj tsam thiab ib puag ncig?

Video: Vim li cas thiaj tseem ceeb rau kev kawm thaj tsam thiab ib puag ncig?
Video: Saib Mis paub Poj niam (hluas nkauj) tus yam ntxwv lub siab 2024, Kaum ib hlis
Anonim

Unit thiab cov ntsiab lus ntawm thaj chaw thiab cheeb tsam yog tseem ceeb rau lej vim lawv yog lub cev ntawm kev ua lej. Lawv yog lub hauv paus rau kev nkag siab lwm yam ntawm geometry xws li ntim thiab lej theorems uas pab peb nkag siab txog algebra, trigonometry, thiab suav lej.

Ntxiv mus, vim li cas nws tseem ceeb rau kev ntsuas ib puag ncig thiab cheeb tsam?

Perimeter thiab cheeb tsam yog ob tseem ceeb thiab cov ntsiab lus tseem ceeb ntawm lej. Perimeter yog a ntsuas ntawm qhov kev ncua deb nyob ib ncig ntawm ib daim duab thiab cheeb tsam muab peb lub tswv yim ntawm ntau npaum li cas deg lub puab npog.

Tom qab ntawd, lo lus nug yog, koj piav qhia thaj chaw li cas? Thaj chaw yog lub sij hawm siv los txhais cov nqi ntawm qhov chaw nqa los ntawm 2D duab lossis nto. Peb ntsuas cheeb tsam nyob rau hauv square units: cm² los yog m². Thaj chaw yog xam los ntawm kev muab qhov ntev ntawm ib daim duab los ntawm nws qhov dav.

Ib yam li ntawd, qhov tseem ceeb ntawm cheeb tsam yog dab tsi?

Thaj chaw yog ib lo lus lej txhais raws li qhov chaw ob sab uas coj los ntawm ib qho khoom, sau tseg Study.com, ntxiv tias kev siv cheeb tsam muaj ntau yam kev siv hauv tsev, ua liaj ua teb, architecture, science, thiab txawm tias ntau npaum li cas cov ntaub pua plag koj yuav tsum tau npog cov chav hauv koj lub tsev.

Yuav ua li cas koj nrhiav tau lub perimeter muab lub cheeb tsam?

Perimeter ntawm Rectangle

  1. Nco ntsoov cov qauv rau ib puag ncig thiab thaj tsam ntawm ib daim duab plaub. Qhov cheeb tsam ntawm ib daim duab plaub yog a = ntev * dav, thaum lub perimeter yog p = (2 * ntev) + (2 * dav)
  2. Hloov cov nqi paub rau hauv cov qauv hauv cheeb tsam. 36 = 4x w.
  3. Hloov cov nqi rau qhov ntev thiab qhov dav rau hauv cov qauv perimeter.

Pom zoo: