Lub npe rau pawg Quadrilaterals yog dab tsi rau cov plaub lub kaum sab xis yog 90?
Lub npe rau pawg Quadrilaterals yog dab tsi rau cov plaub lub kaum sab xis yog 90?

Video: Lub npe rau pawg Quadrilaterals yog dab tsi rau cov plaub lub kaum sab xis yog 90?

Video: Lub npe rau pawg Quadrilaterals yog dab tsi rau cov plaub lub kaum sab xis yog 90?
Video: Saib Mis paub Poj niam (hluas nkauj) tus yam ntxwv lub siab 2024, Kaum ib hlis
Anonim

Nws yog "niam txiv" ntawm lwm tus quadrilaterals , uas tau txais los ntawm kev ntxiv kev txwv ntawm ntau yam: Ib daim duab plaub yog ib qho parallelogram tab sis nrog tag nrho plaub sab hauv lub kaum sab xis tsau ntawm 90 ° Ib lub rhombus yog parallelogram tab sis nrog tag nrho plaub sab sib npaug ntawm qhov ntev.

Tsuas yog li ntawd, puas yog ib lub quadrilateral muaj 4 lub ces kaum uas yog 90?

Ib daim duab plaub yog ib hom quadrilateral nrog plaub txoj cai lub kaum sab xis . Lub ntsiab txhais ntawm ib daim duab plaub yog ib daim duab nrog plaub sab thiab plaub txoj cai lub kaum sab xis . Qhov no txhais tau hais tias txhua lub kaum sab xis hauv ib daim duab plaub 90 qib. Lwm cov cuab yeej ntawm ib daim duab plaub yog tias cov sab nraud yog sib npaug rau ib leeg thiab sib npaug ntawm qhov ntev.

Qhov thib ob, hom plaub fab twg ib txwm muaj 4 lub kaum sab xis?

Lub npe Quadrilateral Kev piav qhia
Daim duab plaub 2 khub ntawm parallel sab. 4 lub kaum sab xis (90 °). Cov sab nraud yog sib npaug thiab sib npaug. Tag nrho cov ces kaum yog congruent.
Square 4 sib sib zog nqus. 4 lub kaum sab xis (90 °). Cov sab nraud yog sib npaug. Txhua lub kaum sab xis yog congruent.
Trapezoid Tsuas yog ib khub ntawm opposite sab yog parallel.

Ib tug kuj yuav nug, dab tsi yog lub npe rau cov pab pawg ntawm Quadrilaterals rau leej twg tag nrho plaub sab yog sib npaug ntev thiab tsis muaj lwm yam kev txwv?

Hauv Euclidean geometry, kite yog a quadrilateral nws plaub sab tuaj yeem muab faib ua ob khub ntawm sib npaug - sab ntev uas nyob ib sab ntawm txhua tus lwm yam . Nyob rau hauv sib piv, ib tug parallelogram kuj muaj ob khub ntawm sib npaug - sab ntev , tab sis lawv yog opposite rau txhua tus lwm yam es tsis nyob ib sab.

Dab tsi yog 4 hom quadrilaterals?

A quadrilateral yog plaub-sided polygon nrog plaub lub kaum sab xis. Muaj ntau hom quadrilaterals . Qhov tsib feem ntau hom yog lub parallelogram, lub duab plaub, square, trapezoid, thiab rhombus.

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