Video: Dab tsi yog lub kaum sab xis tsis suav nrog?
2024 Tus sau: Miles Stephen | [email protected]. Kawg hloov kho: 2023-12-15 23:36
A tsis yog - suav lub kaum sab xis (hauv daim duab peb sab) (ntawm 2 sab AB thiab BC) yog ob qho tib si lub kaum sab xis ACB lub lub kaum sab xis ABC. Qhov twg cov kab liab paub. Lub voj voog lub kaum sab xis yog cov tsis yog - suav cov ces kaum.
Ib yam li ntawd, dab tsi yog qhov tsis suav nrog sab?
Cov " suav sab "hauv ASA yog qhov sab nruab nrab ntawm cov ces kaum siv. Nws yog tus sab qhov twg cov rays ntawm cov ces kaum sib tshooj. Cov " tsis yog - suav nrog " sab hauv AAS tuaj yeem yog ob qho tib si sab uas tsis ncaj nraim ntawm ob lub kaum sab xis siv.
Ib sab saum toj no, dab tsi yog lub ntsiab lus ntawm lub kaum sab xis? Txhais : Cov lub kaum sab xis ua los ntawm ob kab nrog ib qho vertex . Thaum ob kab sib ntsib ntawm ib qho chaw sib xws ( vertex ) cov lub kaum sab xis nruab nrab ntawm lawv yog hu ua suav lub kaum sab xis.
Ua li no, dab tsi yog lub kaum sab xis cais?
Nyob zoo Raymond, Kuv yeej tsis tau siv lo lus no hauv atraverse, txawm hais tias nws yuav muaj nyob. A suav nrog lub kaum sab xis yog ib qho uas suav nrog. Tshem tawm txhais tau hais tias tsis txhob sib nrug los yog tsis suav nrog. Nyob rau hauv ib daim duab peb sab, lub kaum sab xis side.nws hais tias koj muaj ib sab, a lub kaum sab xis thiab ib sab lossis ob sab thiab suav nrog lub kaum sab xis . Yog qhov no yog nyob rau hauv kev siv
SSS SAS ASA AAS yog dab tsi?
SAS (sab-angle-sab) Ob sab thiab lub kaum sab xis ntawm lawv yog congruent. ASA (lub kaum sab xis-lub kaum sab xis) Ob sab thiab sab nruab nrab ntawm lawv yog congruent. AAS (angle-angle-sab)
Pom zoo:
Dab tsi yog lub kaum sab xis ntsuas hauv daim duab peb sab ABC?
Kev piav qhia ib kauj ruam dhau los: Nws tau muab tias ABC yog lub kaum sab xis uas yog kaum sab xis ntawm C thiab AC = 7 ntiv tes thiab CB = 5 ntiv tes. Yog li, qhov ntsuas ntawm cov kaum sab xis uas ploj lawm hauv daim duab peb sab ABC yog 35.5 ° thiab 54.5 ° feem
Cov kab lus hloov sab hauv cov ces kaum piav qhia txoj haujlwm ntawm ob lub kaum sab xis li cas?
Hloov sab hauv cov ces kaum yog tsim los ntawm ib tug transversal intersecting ob parallel kab. Lawv nyob nruab nrab ntawm ob qho tib si kab tab sis nyob rau sab nraud ntawm lub transversal, tsim ob khub (plaub tag nrho cov ces kaum) ntawm cov ces kaum sab hauv. Hloov cov ces kaum sab hauv yog congruent, txhais tau tias lawv muaj qhov sib npaug
Koj tuaj yeem ua pov thawj li cas 2 daim duab peb sab zoo sib xws siv lub kaum sab xis sab SAS zoo sib xws postulate?
SAS Similarity Theorem hais tias yog ob sab hauv ib daim duab peb sab yog proportional rau ob sab hauv lwm daim duab peb sab thiab lub kaum sab xis nyob rau hauv ob qho tib si congruent, ces ob daim duab peb sab zoo ib yam. Ib qho kev hloov pauv zoo sib xws yog ib lossis ntau qhov kev hloov pauv tsis tu ncua ua raws li kev dilation
Dab tsi yog txoj cai kaum rau lwm lub kaum sab xis?
Hloov cov ces kaum sab hauv yog tsim thaum lub transversal hla dhau ob kab. Lub kaum sab xis uas tsim nyob rau sab nraud ntawm lub transversal thiab sab hauv ob kab yog alternate sab hauv cov ces kaum. Lub theorem hais tias thaum cov kab sib npaug, qhov sib txawv sab hauv cov ces kaum sib npaug
Dab tsi yog kev sib raug zoo ntawm sab nrauv thiab sab hauv lub kaum sab xis ntawm daim duab peb sab?
Cov kaum sab hauv yog hu ua Sab hauv cov ces kaum. Cov lej ntawm cov kaum sab hauv ntawm daim duab peb sab yog ib txwm 180 degrees. Lub kaum sab nrauv yog lub kaum sab xis ntawm ib sab ntawm ib qho duab, thiab ib txoj kab txuas ntxiv los ntawm sab tom ntej. Qhov sib npaug ntawm lub kaum sab nrauv thiab nws lub kaum sab hauv uas nyob ib sab kuj yog 180 degrees