Cov txheej txheem:
Video: Dab tsi yog txoj cai kaum rau lwm lub kaum sab xis?
2024 Tus sau: Miles Stephen | [email protected]. Kawg hloov kho: 2023-12-15 23:36
Hloov sab hauv lub kaum sab xis yog tsim thaum ib tug transversal dhau los ntawm ob kab. Cov lub kaum sab xis uas yog tsim rau rov qab sab ntawm transversal thiab hauv ob kab yog hloov sab hauv lub kaum sab xis . Cov theorem hais tias thaum cov kab yog parallel, uas hloov sab hauv lub kaum sab xis sib npaug.
Ua li no, ua cov ces kaum sib txawv ntxiv txog 180?
Hloov cov ces kaum sib npaug. (c thiab f kuj yog hloov ). Hloov cov ces kaum tsim 'Z' zoo thiab qee zaum hu ua 'Z lub kaum sab xis '. Ib ob lub kaum sab xis uas ntxiv mus txog 180 degrees yog hu ua supplementary lub kaum sab xis.
Ib tug kuj yuav nug, dab tsi yog lwm lub kaum sab xis nrog piv txwv? Hloov Sab hauv Lub kaum sab xis . Thaum ob kab hla los ntawm lwm kab (hu ua Transversal): Hloov Sab hauv Lub kaum sab xis yog ib khub lub kaum sab xis nyob rau sab hauv ntawm txhua ntawm ob kab no tab sis nyob rau sab nraud ntawm lub transversal. Hauv no piv txwv , cov no yog ob khub ntawm Hloov Sab hauv Lub kaum sab xis :c ib f.
Ib yam li ntawd, txoj cai kaum yog dab tsi?
Lub kaum sab xis
- Cov ces kaum sib npaug.
- Lub vertically opposite ces kaum yog sib npaug.
- Qhov sib txawv sab hauv cov ces kaum sib npaug.
- Cov ces kaum sab nrauv sib npaug sib npaug.
- Ob lub kaum sab hauv ntawm tib sab ntawm lub transversal yog supplementary.
Dab tsi yog alternate sab nrauv lub kaum sab xis?
Hloov sab nrauv Angles . Thaum ob kab hla los ntawm lwm kab (hu ua Transversal): Hloov sab nrauv Angles yog ib khub lub kaum sab xis nyob rau sab nraud ntawm txhua ntawm ob kab no tab sis nyob rau sab nraud ntawm transversal. Hauv qhov piv txwv no, cov no yog ob khub ntawm Hloov sab nrauv Angles ib: a h.
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
Yuav ua li cas koj nrhiav tau tus kab pheeb ces kaum ntawm txoj cai kaum sab xis?
Txhawm rau nrhiav qhov ntev ntawm kab pheeb ces kaum (orhypotenuse) ntawm txoj cai daim duab peb sab, hloov qhov ntev ntawm ob sab perpendicular rau hauv cov mis a2 + b2 = c2, qhov twg a thiab b yog qhov ntev ntawm sab perpendicular thiab c yog qhov ntev ntawm lub hypotenuse
Lub npe rau pawg Quadrilaterals yog dab tsi rau cov plaub lub kaum sab xis yog 90?
Nws yog 'niam txiv' ntawm qee qhov quadrilaterals, uas tau txais los ntawm kev ntxiv kev txwv ntawm ntau yam: Ib lub duab plaub yog ib qho parallelogram tab sis nrog tag nrho plaub lub kaum sab hauv kho ntawm 90 ° A rhombus yog ib qho parallelogram tab sis nrog tag nrho plaub sab sib npaug ntawm qhov ntev
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 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