Video: Dab tsi yog quadrilateral nrog 2 parallel sab?
2024 Tus sau: Miles Stephen | [email protected]. Kawg hloov kho: 2023-12-15 23:36
A quadrilateral nrog ob khub ntawm parallel sab hu ua parallelogram. Yog cov khub no parallel sab sib ntsib ntawm txoj cai kaum, lub parallelogram kuj yog ib daim duab plaub.
Ib sab ntawm qhov no, lub quadrilateral nrog ob sab sib luag hu ua dab tsi?
A quadrilateral nrog raws nraim ob sab sib npaug yog hu ua Trapezium (los yog a trapezoid ).
Kuj Paub, dab tsi yog ib tug duab nrog 2 parallel sab? Parallelogram: Ib quadrilateral nrog 2 khub ntawm parallel sab . Rectangle: Ib qho parallelogram nrog 4 lub kaum sab xis.
Nyob rau hauv no txoj kev, muaj pes tsawg tus parallel sab yog quadrilateral?
Tshwj xeeb Quadrilaterals Ib qho parallelogram muaj ob parallel khub ntawm opposite sab. Ib daim duab plaub muaj ob khub ntawm opposite sab parallel, thiab plaub txoj cai kaum. Nws tseem yog parallelogram, vim nws muaj ob khub ntawm parallel sab. Ib square muaj ob khub ntawm parallel sab, plaub lub kaum sab xis, thiab tag nrho plaub sab sib npaug.
Hom quadrilateral twg muaj ob khub ntawm qhov sib npaug ntawm sab thiab plaub sab sib dhos?
Rhombus
Pom zoo:
Dab tsi yog lub kaum sab xis sum khoom ntawm ib lub quadrilateral?
Raws li lub kaum sab xis ntawm cov cuab yeej ntawm Quadrilateral, cov lej ntawm tag nrho plaub lub kaum sab hauv yog 360 degrees
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
Vim li cas nws thiaj li hais tias lub Orthocenter ntawm daim duab peb sab obtuse yuav tsum nyob rau sab nraud ntawm daim duab peb sab?
Nws hloov tawm tias tag nrho peb qhov siab ib txwm sib tshuam ntawm tib lub ntsiab lus - lub npe hu ua orthocenter ntawm daim duab peb sab. Lub orthocenter tsis yog ib txwm nyob hauv daim duab peb sab. Yog tias daim duab peb sab yog obtuse, nws yuav nyob sab nraud. Txhawm rau ua kom qhov no tshwm sim cov kab qhov siab yuav tsum tau txuas ntxiv kom lawv hla
Dab tsi yog lub kaum sab nrauv ntawm lub quadrilateral?
Qhov sib npaug ntawm cov kaum sab nrauv ntawm quadrilaterals. Thaum ob sab ntawm lub quadrilaterals txuas ntxiv thiab cov ces kaum sab nrauv raug tsim. Qhov sib npaug ntawm plaub lub kaum sab nrauv yog ib txwm 360 degrees
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