Kev zoo sib thooj txheej xwm ntawm cov vajvoos peb sab: lub tswvyim thiab Scope

Ib qho tseem ceeb tswvyim nyob rau hauv geometry raws li ib tug science, yog kev zoo sib thooj ntawm cov nuj nqis. Paub txog tej zog pub rau peb daws tau ib tug zoo tus naj npawb ntawm kev pab raws qib, xws li nyob rau hauv lub neej tiag tiag.

tswv yim

Zoo li daim no yog cov uas yuav tsum hloov dua siab tshiab rau hauv txhua lwm yam los ntawm txawj tag nrho cov sab los ntawm ib tug tej yam tau. Wherein duas cov ces kaum yuav tsum tau sib npaug.

Cia peb xav txog nyob rau hauv ntau yam ntawm cov cim qhia ntawm kev zoo sib thooj ntawm cov vajvoos peb sab. Muaj peb cov kev cai uas tso cai rau peb mus hais tias cov nuj nqis muaj cov cuab yeej no.

Tus thawj kos npe rau ntawm zoo xws li cov duab peb ceg yuav tsum tau hais tias tus koob pheej ntawm lawv ntawm lub ob khub ntawm coj cov ces kaum.

Raws li ib tug thib ob txoj cai, saib cov nuj nqis no yog zoo xws li cov thaum ob tog ntawm lub duas paub feem yog xwm yeem mus rau lwm yam. Lub ces kaum uas yog tsim nyob rau los ntawm lawv, yuav tsum tau sib npaug.

Thiab thaum kawg, qhov peb kos npe rau: lub duab peb ceg yog zoo xws li cov hais tias tag nrho lawv cov sab yog proportional.

Muaj ib co nuj nqis uas nyob rau hauv ib co cov khoom yuav ntaus nqi rau ib hom (equilateral, ceskaum, lub). Rau kev pom zoo, xws cov vajvoos peb sab yog zoo sib xws, yuav tsum tau ua tsawg tej yam kev mob. Peb muaj piv txwv li, xav txog kev zoo sib thooj ntawm cov yam ntxwv ntawm ib lub cov vajvoos peb sab:

1. hypotenuse thiab ib tug ntawm ob txhais ceg ntawm ib tug proportional rau qhov sab ntawm lwm cov;
2. tej mob kaum sab xis ntawm ib daim duab yog tib yam nyob rau hauv lub lwm yam.

Yog hais tias koj pom tej yam tshwm sim zoo sib xws cov vajvoos peb sab, peb muaj cov nram qab no cov khoom:

1. piv ntawm linear ntsiab (medians, bisectors, heights, perimeters) sib npaug zos rau cov coefficient ntawm kev zoo sib thooj;
2. Yog hais tias koj nrhiav tau ib qhov chaw faib lub txiaj ntsim, peb muab tau cov square ntawm no tus xov tooj.

daim ntawv thov

Qhov saum toj no cov khoom pub rau peb kom peb daws tau ib tug lossis loj tus naj npawb ntawm geometric teeb meem. Lawv yog lug siv nyob rau hauv lub neej tiag tiag. Paub txog tej yam tshwm sim ntawm kev zoo sib thooj ntawm cov vajvoos peb sab, koj yuav tau txiav txim hauv lub qhov siab ntawm ib tug kwv los yog mus rau xam qhov kev ncua deb rau tej thaj chaw deb taw tes.

Yog xav paub, piv txwv li, lub qhov siab ntawm ib tsob ntoo, nyob rau ib pre-ntsuas deb teem mas ncej uas yog tas qhov yam pluaj. Nws yog qhia rau tus kwv thiab cov sab saum toj cim rau hauv av qhov twg rau txoj kab, tseem nws tshuam cov kab rov tav nto. Peb tau zoo xws li cov cai-angled cov vajvoos peb sab. Xab qhov kev ncua deb ntawm ib tug taw tes rau saum tus ncej, thiab ces mus rau tus kwv, peb yuav nrhiav tau kev zoo sib thooj coefficient. Paub qhov siab ntawm tus ncej, koj yuav yooj yim xam tib lub parameter rau tsob ntoo.

Yuav kom nrhiav tau qhov kev ncua deb ntawm ob lub ntsiab lus nyob rau hauv lub teb los xaiv lub dav hlau. Ces ntsuas qhov kev ncua deb ntawm nws mus rau muaj. Txuas tag nrho cov dots rau hauv av thiab ntsuas cov ces kaum uas yog nyob ib sab mus rau lub zoo-paub sab. Los ntawm constructing xws li ib tug daim duab peb sab ntawm daim ntawv thiab kev txiav txim piv ntawm lub sab ntawm ob nuj nqis, yooj yim laij tau qhov kev ncua deb ntawm cov ntsiab lus.

Yog li, tej yam tshwm sim zoo sib xws cov vajvoos peb sab - ib qho ntawm feem tseem ceeb cov ntsiab lus ntawm geometry. Nws yog dav siv tsis tsuas yog rau cov kev tshawb fawb, tab sis kuj rau lwm cov laj thawj.