Cov txheej txheem:

Vim li cas qhov opposite sab ntawm parallelogram sib npaug?
Vim li cas qhov opposite sab ntawm parallelogram sib npaug?

Video: Vim li cas qhov opposite sab ntawm parallelogram sib npaug?

Video: Vim li cas qhov opposite sab ntawm parallelogram sib npaug?
Video: Opposite Words - Learning about Opposites - Antonyms 2024, Kaum ib hlis
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Cov opposite kaum ntawm parallelogram yog sib npaug . Cov opposite sab ntawm ib daim duab plaub yog sib npaug . Diagonals ntawm a parallelogram sib cais.

Tsis tas li lo lus nug yog, puas yog ob sab ntawm lub parallelogram sib npaug?

Hauv Euclidean geometry, a parallelogram yog ib qho yooj yim (tsis-tus kheej-kev sib tshuam) quadrilateral nrog ob khub ntawm parallel sab . Cov rov qab los yog ntsib ob sab ntawm daim duab plaub yog ntawm sib npaug ntev thiab cov opposite kaum ntawm parallelogram yog ntawm sib npaug ntsuas

Tsis tas li ntawd, dab tsi yog cov ces kaum sib txawv ntawm cov duab sib dhos? A Parallelogram yog ib lub tiaj tus nrog rov qab sab parallel thiab sib npaug ntawm qhov ntev. Kaum "a" thiab "b" ntxiv txog 180 °, yog li lawv tau ntxiv lub kaum sab xis . CEEB TOOM: Squares, Rectangles thiab Rhombuses yog tag nrho Parallelograms !

Ua raws li qhov kev pom no, vim li cas cov sab nraud ntawm qhov sib npaug sib npaug?

THEOREM: Yog tias plaub fab plaub fab muaj kab pheeb ces kaum uas sib cais ib leeg, ces nws yog parallelogram . THEOREM: Yog hais tias lub quadrilateral muaj ib txheej ntawm ob sab uas yog ob leeg kev sib haum xeeb thiab thaum uas tig mus, ces nws yog a parallelogram . Txoj kev kawg no tuaj yeem txuag lub sijhawm thiab lub zog thaum ua haujlwm ua pov thawj!

Dab tsi yog 4 yam khoom ntawm parallelogram?

Parallelogram muaj cov khoom hauv qab no:

  • Ob sab sib tw yog qhov sib thooj los ntawm kev txhais.
  • Cov sab nraud yog congruent.
  • Lub kaum ntse ntse sib txawv yog sib xws.
  • Cov kaum sib law liag yog ntxiv.
  • Cov diagonals sib sib zog nqus.

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