Video: Lub kaum sab xis twg yog sib haum?
2024 Tus sau: Miles Stephen | [email protected]. Kawg hloov kho: 2023-12-15 23:36
Thaum ob kab sib tshuam lawv tsim ob khub ntawm lub kaum sab xis, A + C thiab B + D. Lwm lo lus rau cov ces kaum sib txawv yog ntsug kaum . Vertical angles yeej ib txwm congruent, uas txhais tau hais tias lawv sib npaug. Cov ces kaum uas nyob ib sab yog cov ces kaum uas tawm ntawm tib vertex.
Tsis tas li ntawd, ob lub kaum sab xis twg tsis sib haum?
Vertical angles share ib vertex. Thaum ob kab sib tshuam, ob khub ntawm lub kaum sab nraud yog tsim. Cov ces kaum sib txawv no yog congruent. Lawv tsis nyob ib sab ces kaum vim lawv tsis sib koom ib sab.
Tsis tas li ntawd, tib lub kaum sab xis puas sib haum? Ib sab sab hauv lub kaum sab xis yog on tib sab ntawm transversal. Ib sab sab hauv lub kaum sab xis yog kev sib haum xeeb thaum kab yog parallel.
Ib yam li ntawd ib tug yuav nug, uas ob lub ces kaum yog supplementary?
Cov ces kaum ntxiv yog ob qho tib si lub kaum sab xis nws ntsuas sum rau 180 degrees. Ntxiv lub kaum sab xis yuav yog ob txoj cai lub kaum sab xis (ob leeg 90 degrees) los yog ib qho mob lub kaum sab xis thiab ib tug obtuse lub kaum sab xis . Yog ob lub kaum sab xis yog ob leeg ntxiv rau tib yam lub kaum sab xis , ces ob lub kaum sab xis yog kev ntsuas sib npaug.
Puas yog obtuse kaum sab xis tuaj yeem ntxiv?
Teb thiab piav qhia: Tsis yog, obtuse kaum sab xis ua tsis tau cov ces kaum ntxiv . Nyob rau hauv kev txiav txim rau lub obtuse kaum sab xis ua ntxiv , lawv yuav tsum tau ntxiv txog 180 °. Raws li qhov sum ntawm obtuse kaum sab xis Nws yuav tsum siab tshaj 180 °, nws tsis tuaj yeem sib npaug li 180 °.
Pom zoo:
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
Yuav ua li cas koj pom lub sab hauv ntawm lub kaum sab xis?
Yuav Ua Li Cas Nrhiav Sab Hauv Lub Kaum Qhov sum ntawm cov ces kaum hauv daim duab peb sab ib txwm sib npaug 180o. Squares muaj 4 qhov sib npaug sab thiab cov lej ntawm cov ces kaum ib txwm sib npaug 360o. Txhawm rau nrhiav qhov ntsuas ntawm cov ces kaum sab hauv hauv ib lub xwmfab, koj faib cov lej ntawm cov ces kaum (360o) los ntawm tus lej ntawm sab (4)