Cov tub ntxhais kawm laus zuj zus tuaj, qhov xav tau ntau dua rau kev daws teeb meem yooj yim. Tsis muaj sij hawm ntau yog muab rau hauv kev xeem los daws cov piv txwv yooj yim lossis teeb meem rau lub sijhawm ntev. Yuav ua li cas nrhiav tau tus kab pheeb ces kaum ntawm lub square sai thiab yooj yim? Qhov no yog qhia rau cov menyuam kawm ntawv qib yim. Kab lus no qhia ob txoj hauv kev - ib qho ntev dua, lwm qhov yog nrawm dua.
Yuav ua li cas xam cov kab pheeb ces kaum ntawm ib square?
thawj txoj hauv kev yog qhov paub zoo thiab paub txog Pythagorean theorem. Nyob rau hauv ib lub square, tag nrho cov ces kaum yog txoj cai, uas txhais tau hais tias cov kab pheeb ces kaum faib nws mus rau hauv ob lub vaj huam sib luag txoj cai-angled daim duab peb sab thiab nws tus kheej yog lawv hypotenuse. Raws li Pythagorean theorem, lub square ntawm lub hypotenuse yog sib npaug rau cov lej ntawm cov squares ntawm ob txhais ceg.
Txoj kev thib ob yog cov qauv yooj yim uas tshwj xeeb rau cov squares, thiab koj tsuas yog yuav tsum nco ntsoov nws. Raws li koj paub, txhua sab ntawm ib lub square yog sib npaug, thiab vim li ntawd cov lej tau suav cov qauv hauv qab no rau kev nrhiav nws kab pheeb ces kaum: nws yog sib npaug rau cov khoom ntawm sab thiab lub hauv paus ntawm ob.
Tau kawg, nws yog qhov zoo tshaj plaws kom nco ntsoov cov qauv ntawm qhov ntev ntawm kab pheeb ces kaum ntawm ib lub square thiab siv nws ib txwm, vim nws yooj yim dua thiab yooj yim dua. Qhov no yog qhov tshwj xeeb tshaj yog thaum daws teeb meem hauv daim ntawv sau, qhov uas tsis yog tag nrho cov hauv paus loj, koj tuaj yeem tau txais los ntawm ib qho khoom xwb.
Example
Piv txwv li, ib qho 6 x 6 square, uas yog, nrog ib sab sib npaug rau rau centimeters.
Raws li thawj txoj kev: cia tus kab pheeb ces kaum yog C, thiab sab yog A.
Ces peb tau C=√A^2+A^2 los yog C=√2A^2.
Cia sau ua tus lej: С=√36 + 36. Peb tau √72, uas yog 3√8 lossis 6√2.
Thiab tam sim no cia peb pom tib lub kab pheeb ces kaum, tab sis los ntawm txoj kev thib ob: C=A√2 lossis hauv daim ntawv naj npawb: 6√2
Tam sim no koj tuaj yeem pom ntau npaum li cas txoj kev thib ob yog sai dua, yooj yim dua thiab tseem ceeb tshaj - ua haujlwm zoo dua, tshwj xeeb tshaj yog cov teeb meem yooj yim, vim tias txhua feeb yog qhov tseem ceeb hauv kev xeem!
Lwm yam khoom ntawm square kab pheeb ces kaum
Dhau li ntawm kev paub yuav ua li cas thiaj nrhiav tau kab pheeb ces kaum ntawm lub square, koj kuj yuav tsum paub lawv cov khoom. Cov tseem ceeb yog:
- Cov kab pheeb ces kaum sib npaug rau ib leeg thiab qhov chaw sib tshuam tau muab faib ua ib nrab.
- Lawv tsim lub kaum sab xis thaum lawv sib tshuam.
- Faib lub square rau hauv vaj huam sib luag daim duab peb sab.
Zoo kawg
Cov lus nug ntawm yuav ua li cas suav cov kab pheeb suab ntawm ib lub xwmfab feem ntau nug los ntawm cov tub ntxhais kawm uas tsis tau cov ncauj lus no hauv tsev kawm. Txawm li cas los xij, txhua tus yuav tsum paub cov kev cai tseem ceeb ntawm kev ua lej! Nws yog ntshaw kom daws tau sai li sai tau, thiab qhov no yuav tsum muaj kev paub txog cov qauv luv luv. Tag nrho cov no yog qhov yooj yim heev thiab yooj yim, tab sisNyob rau tib lub sijhawm, nws yog lub hauv paus tsim nyog rau kev daws teeb meem ntau dua yav tom ntej. Thiab qhov tseem ceeb ntawm lub hauv paus no yog lub xwmfab.
