Paub txog kev ntsuas ntsuas ib square metres tuaj yeem muaj txiaj ntsig zoo rau kev xaum tsev thiab muag lub hom phiaj, nws kuj tseem tuaj yeem pab koj kov yeej qhov ntsuas ntawm geometry. Txhawm rau ntsuas thaj tsam ntawm chav, koj tsuas yog yuav tsum nrhiav thaj tsam ntawm qhov sib txawv ntawm chav thiab ntxiv lawv. Yog tias koj xav paub ntsuas thaj tsam ntawm ib chav, ua raws cov theem no.
Kauj ruam
Txoj Kev 1 ntawm 2: Nrhiav thaj tsam ntawm Chav Hauv Square Meters
Kauj Ruam 1. Faib chav rau qhov ntsuas tau
Yog tias koj muaj teeb meem nrhiav thaj tsam ntawm ib chav hauv square metres, nws yuav yog vim koj tsis ua haujlwm nrog chav ncaj uas yog ib qhov ntev thiab ib qhov dav. Chav uas koj xav ntsuas tuaj yeem muaj cov duab plaub uas nthuav tawm hauv qee qhov chaw thiab tej zaum yuav tsis xwm yeem. Txhua yam koj yuav tsum tau ua yog faib chav nyob rau hauv txawm tias cov duab plaub lossis duab plaub. Txhawm rau nrhiav thaj tsam hauv square metres, lossis thaj tsam, lossis tag nrho chav, koj yuav tsum nrhiav thaj tsam hauv square metres ntawm txhua chav thiab tom qab ntawd ntxiv lawv ua ke.
- Kos kab tsaus ntuj kom cais qhov sib txawv.
- Sau lawv rau A, B, thiab C kom yooj yim rau koj.
Kauj Ruam 2. Ntsuas qhov ntev thiab dav ntawm thawj ntu
Siv tus pas ntsuas lossis ntsuas ntsuas, nrhiav qhov ntev thiab dav ntawm thawj qhov chaw koj ntsuas, Tshooj A.
Piv txwv li, qhov ntev ntawm chav yog 15 meters, thiab qhov dav yog 12 meters
Kauj Ruam 3. Muab qhov ntev ntawm thawj seem qhov chaw los ntawm nws qhov dav
Txhawm rau nrhiav cov square metres - lossis thaj tsam - ntawm chav, yooj yim muab qhov ntev los ntawm qhov dav, zoo li koj tau ntsuas thaj tsam ntawm lub duab plaub.
Piv txwv: 15 m x 12 m = 180 square metres
Kauj Ruam 4. Ntsuas qhov ntev thiab dav ntawm ntu thib ob
Cia peb hais qhov ntev ntawm Chav B yog 20 meters, thiab qhov dav ntawm Chav B yog 10 meters.
Kauj Ruam 5. Muab qhov ntev ntawm ntu thib ob ntawm qhov chaw los ntawm nws qhov dav
Qhov no yuav ua rau thaj tsam ntawm ntu thib ob ntawm qhov chaw hauv square metres. Nov yog yuav ua li cas thiaj nrhiav tau cov square metres ntawm Chav B:
Piv txwv: 20 m x 10 m = 200 square metres
Kauj Ruam 6. Ntsuas qhov ntev thiab dav ntawm ntu peb
Cia peb hais qhov ntev ntawm Chav C yog 20 meters, thiab qhov dav yog 35 meters.
Kauj Ruam 7. Muab qhov ntev ntawm ntu thib peb qhov chaw los ntawm nws qhov dav
Qhov no yuav ua rau thaj tsam ntawm ntu thib peb ntawm qhov chaw hauv square metres. Nov yog yuav ua li cas thiaj nrhiav tau cov square metres ntawm Chav C:
Piv txwv: 35 m x 20 m = 700 square metres
Kauj Ruam 8. Ntxiv thaj tsam hauv square metres ntawm peb chav
Thaum koj pom tus lej ntawd, koj yuav paub thaj tsam ntawm tag nrho chav hauv square metres. Nov yog yuav ua li cas:
- Cheeb Tsam Ntawm Chav A hauv square metres + thaj tsam ntawm Chav B hauv square metres + thaj tsam ntawm Chav C hauv square metres = thaj tsam ntawm chav nyob hauv square metres
- 180 + 200 + 700 = 1080 square metres.
Txoj Kev 2 ntawm 2: Kawm Qee Qhov Ua Ntej Los Nrhiav Square Meters
Kauj Ruam 1. Nrhiav thaj tsam kwv yees li ib square meter
Yog tias koj tab tom nrhiav thaj tsam kwv yees li ib square meter, koj tseem tuaj yeem sim ntsuas sab nrauv ntawm koj lub tsev thiab tom qab ntawd rho tawm los ntawm thaj chaw uas tsis haum rau thaj tsam ntawm chav, xws li lub sam thiaj lossis chav nres tsheb staircase.
Kauj Ruam 2. Nrhiav cov square metres ntawm chav nyob hauv ib lub voj voog
Yog tias muaj ib feem ntawm koj lub tsev uas zoo li ib lub voj voog, koj tuaj yeem pom cov square metres los ntawm kev xav tias chav nyob yog lub voj voog thiab tom qab ntawd faib nws ib nrab. Txhawm rau ua qhov no, tsuas yog ntsuas kab ntev uas txiav "lub voj voog" hauv ib nrab kom tau txais txoj kab uas hla.
Tom qab ntawd, faib los ntawm 2 kom tau txais lub vojvoog, tom qab ntawd ntsaws rau hauv qhov sib npaug A = r^2 qhov twg r yog lub vojvoog, thiab faib los ntawm 2 kom tau thaj tsam ntawm chav, lossis square metres, ntawm ib nrab ib nrab
Kauj Ruam 3. Nrhiav lub square meter ntawm chav uas yog "yuav luag" ncaj
Yog tias koj tab tom ntsuas ib qho chaw uas yuav luag yuav luag ib lub duab plaub lossis ib lub duab plaub, nrog ib feem ntawm lub duab plaub lossis duab plaub uas tsis muaj dab tsi, tom qab ntawd ntsuas thaj tsam ntawm tag nrho chav zoo li yog qhov khoob. Tom qab ntawd, nrhiav thaj tsam ntawm qhov chaw khoob thiab rho nws los ntawm thaj chaw ntawm tag nrho qhov chaw kom pom qhov tseeb square metres ntawm qhov chaw. Qhov no yuav txuag koj lub sijhawm.
