Cov txheej txheem:
- 1. Yuav ua li cas thiaj nrhiav tau ib puag ncig ntawm daim duab peb sab, paub txog peb sab
- 2. Yuav ua li cas thiaj nrhiav tau lub perimeter ntawm daim duab peb sab, paub txog nws cheeb tsam thiab lub vojvoog ntawm lub voj voog inscribed
- 3. Yuav ua li cas xam cov perimeter ntawm ib daim duab peb sab, paub txog ob sab thiab lub kaum sab xis ntawm lawv
- 4. Yuav ua li cas thiaj nrhiav tau lub cheeb tsam ntawm ib daim duab peb sab sib npaug, paub txog ib sab
- 5. Yuav ua li cas xam cov perimeter ntawm daim duab peb sab isosceles, paub txog sab thiab puag
- 6. Yuav ua li cas thiaj nrhiav tau lub cheeb tsam ntawm daim duab peb sab isosceles, paub txog sab thiab qhov siab
- 7. Yuav ua li cas xam lub cheeb tsam ntawm ib daim duab peb sab, paub cov ceg
- 8. Yuav ua li cas thiaj nrhiav tau ib puag ncig ntawm daim duab peb sab, paub txog ceg thiab hypotenuse
2024 Tus sau: Malcolm Clapton | [email protected]. Kawg hloov kho: 2023-12-17 03:58
Xaiv ib qho qauv raws li paub qhov ntau.
1. Yuav ua li cas thiaj nrhiav tau ib puag ncig ntawm daim duab peb sab, paub txog peb sab
Tsuas suav cov lej ntawm txhua sab.
- P yog qhov xav tau ib puag ncig;
- a, b, c - sab ntawm daim duab peb sab.
2. Yuav ua li cas thiaj nrhiav tau lub perimeter ntawm daim duab peb sab, paub txog nws cheeb tsam thiab lub vojvoog ntawm lub voj voog inscribed
Muab cov cheeb tsam ntawm daim duab peb sab los ntawm 2.
Faib qhov tshwm sim los ntawm lub vojvoog ntawm lub voj voog inscribed.
- P yog qhov xav tau ib puag ncig;
- S yog thaj tsam ntawm daim duab peb sab;
- r yog lub vojvoog ntawm lub voj voog inscribed.
3. Yuav ua li cas xam cov perimeter ntawm ib daim duab peb sab, paub txog ob sab thiab lub kaum sab xis ntawm lawv
Ua ntej, nrhiav qhov tsis paub ntawm daim duab peb sab siv lub theorem cosine:
- Muab ib sab los ntawm lwm tus, los ntawm cosine ntawm lub kaum sab xis ntawm lawv, thiab los ntawm 2.
- Xam cov lej ntawm cov squares ntawm cov paub sab thiab rho tawm los ntawm nws tus lej tau txais hauv cov kauj ruam dhau los.
- Nrhiav lub hauv paus ntawm qhov tshwm sim.
Tam sim no ntxiv ob sab uas paub yav dhau los rau sab pom.
- P yog qhov xav tau ib puag ncig;
- b, c - paub sab ntawm daim duab peb sab;
- ɑ yog lub kaum sab xis ntawm sab paub;
- a - tsis paub sab ntawm daim duab peb sab.
4. Yuav ua li cas thiaj nrhiav tau lub cheeb tsam ntawm ib daim duab peb sab sib npaug, paub txog ib sab
Muab qhov sib npaug ntawm 3.
- P yog qhov xav tau ib puag ncig;
- a - ib sab ntawm daim duab peb sab (nco tias hauv daim duab peb sab equilateral txhua sab yog sib npaug).
5. Yuav ua li cas xam cov perimeter ntawm daim duab peb sab isosceles, paub txog sab thiab puag
Muab qhov sib npaug ntawm 2.
Ntxiv lub hauv paus rau qhov tshwm sim.
- P yog qhov xav tau ib puag ncig;
- a - sab ntawm daim duab peb sab (hauv daim duab peb sab isosceles, ob sab sib npaug);
- b - lub hauv paus ntawm daim duab peb sab (qhov no yog sab uas txawv ntawm qhov ntev ntawm tus so).
6. Yuav ua li cas thiaj nrhiav tau lub cheeb tsam ntawm daim duab peb sab isosceles, paub txog sab thiab qhov siab
Nrhiav sab thiab qhov siab squares.
Tshem tus thib ob los ntawm thawj tus lej.
Nrhiav lub hauv paus ntawm qhov tshwm sim thiab muab nws los ntawm 2.
Ntxiv ob sab rau tus lej tshwm sim.
- P yog qhov xav tau ib puag ncig;
- a - lateral sab ntawm daim duab peb sab;
- h yog qhov siab (lub perpendicular poob mus rau lub hauv paus ntawm daim duab peb sab los ntawm sab ntawm lub opposite vertex; nyob rau hauv ib tug isosceles daim duab peb sab, qhov siab faib lub hauv paus nyob rau hauv ib nrab).
7. Yuav ua li cas xam lub cheeb tsam ntawm ib daim duab peb sab, paub cov ceg
Nrhiav cov squares ntawm ob txhais ceg thiab suav lawv cov lej.
Extract lub hauv paus ntawm lub resulting naj npawb.
Ntxiv ob txhais ceg rau qhov tshwm sim.
- P yog qhov xav tau ib puag ncig;
- a, b - ob txhais ceg ntawm daim duab peb sab (sab uas tsim lub kaum sab xis).
8. Yuav ua li cas thiaj nrhiav tau ib puag ncig ntawm daim duab peb sab, paub txog ceg thiab hypotenuse
Suav cov squares ntawm lub hypotenuse thiab ceg.
Tshem tus thib ob los ntawm thawj tus lej.
Nrhiav lub hauv paus ntawm qhov tshwm sim.
Ntxiv ceg thiab hypotenuse.
- P yog qhov xav tau ib puag ncig;
- a - txhua ceg ntawm daim duab plaub;
- c - hypotenuse (sab uas nyob opposite lub kaum sab xis).
Pom zoo:
Vim li cas kev sib tham hauv tsev neeg xav tau thiab yuav ua li cas thiaj li txhawb tau lawv hauv lub sijhawm ntawm kev sib txuas lus hauv Internet
Phau ntawv tshiab los ntawm American sociologist Sherry Turkle "Nrog lub suab nyob. Yog vim li cas tham thiab mloog hauv lub hnub nyoog digital” - ntawm qhov tseem ceeb ntawm kev sib txuas lus hauv tsev neeg rau kev loj hlob ntawm cov me nyuam
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