Video: Lub trapezoid thiab lub duab plaub txawv li cas?
2024 Tus sau: Miles Stephen | [email protected]. Kawg hloov kho: 2023-12-15 23:36
Properties ntawm a Trapezoid :
Thaj chaw yog bisected los ntawm txoj kab koom nrog midpoints ntawm parallel sab. Cov duab plaub muaj plaub lub kaum sab xis thaum trapezoids tsis txhob. 2. Ob sab ntawm a duab plaub yog parallel thiab sib npaug thaum nyob rau hauv cov ntaub ntawv ntawm a trapezoid qhov opposite sab ntawm yam tsawg kawg yog ib khub yog parallel.
Ntxiv mus, yuav ua li cas lub trapezoid zoo ib yam li lub duab plaub?
Yog li cov trapezoid yog quadrilateral vim nws muaj plaub sab. A duab plaub tuaj yeem raug hu ua trapezoid raws li nws ib khub ntawm opposite yog parallel thiab sib npaug. Ntawm qhov tod tes a trapezoid tej zaum yuav tsis muaj tag nrho nws sab hauv plaub lub kaum ntse ntse tab sis a duab plaub yuav tsum muaj tag nrho nws cov ces kaum raws li txoj cai kaum.
Vim li cas lub trapezoid tsis yog duab plaub? Qee phau ntawv txhais tias a trapezoid raws li muaj raws nraim ib txheej ntawm parallel sab. A duab plaub ntawm lwm yam qualities, yuav tsum muaj ob pawg ntawm parallel sab. Yog li hauv qab no txhais a trapezoid tsis yog ib duab plaub . Qee phau ntawv txhais tias a trapezoid raws li muaj tsawg kawg yog ib txheej ntawm parallel sab.
Kuj tseem yuav paub yog, puas yog lub duab plaub suav tias yog trapezoid?
TSIS MUAJ. A trapezoid txhais tau tias (hauv North America) ua a quadrilateral uas muaj raws nraim ib khub ntawm parallel sab. (Qhov khoom no hu ua a trapezium hauv British English.) A quadrilateral nrog ob khub ntawm parallel sab yog hu ua a parallelogram ; a parallelogram nrog lub kaum sab xis yog ib daim duab plaub.
Dab tsi yog parallelogram thiab trapezoid sib txawv?
Ob leeg yog quadrilaterals. A parallelogram muaj ob khub ntawm parallel sab. A trapezoid tsuas yog yuav tsum muaj ib khub ntawm qhov sib luag.
Pom zoo:
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Yuav ua li cas muaj pes tsawg tus ntug polyhedron uas muaj plaub lub ntsej muag thiab plaub vertices?
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