Video: Muaj pes tsawg 90 degree kaum ib parallelogram?
2024 Tus sau: Miles Stephen | [email protected]. Kawg hloov kho: 2023-12-15 23:36
Cov sab nraud thiab cov ces kaum sab nraud yog sib haum. Thesum of lub kaum sab xis ntawm a Parallelogram sib 360 qib . Rau lub Rectangle los yog Square qhov sum tag nrho ntawm plaub fab, txhua a 90 degree tig, muab peb 360 qib.
Ib yam li ntawd, koj tuaj yeem nug, puas yog parallelogram muaj 4 90 degree kaum?
Nov yog tej yam uas yuav tsum nco ntsoov. Ib square muaj tau 4 sab ntawm sib npaug ntev thiab 4 txoj cai lub kaum sab xis (yog lub kaum sab xis = 90 degrees ). A Rhombus muaj tau 4 ob sab ntawm qhov sib npaug ntawm qhov ntev thiab rov qab sab yog parallel thiab lub kaum sab xis sib npaug.
Tsis tas li ntawd, muaj pes tsawg lub kaum sab xis muaj qhov parallelogram? plaub lub kaum sab xis
Ib yam li ntawd, puas parallelogram muaj 90 degrees?
Classic txhais ntawm a parallelogram nyob rau hauv Euclidean geometry yog tias nws tsis yog kev sib tshuam quadrilateral ABCD nrog AB parallel rau CD thiab BC parallel toDA. Lub txim ntawm lub ntsiab txhais yog qhov opposite ces kaum yog ntawm kev ntsuas sib npaug. Yog li ntawd yog ib lub kaum sab xis 90 degrees , lub opposite lub kaum sab xis kuj 90 degrees.
Muaj pes tsawg 90 degree kaum ib tug trapezoid?
Teb thiab piav qhia: A trapezoid tej zaum tsis muaj muaj cai lub kaum sab xis , los yog nws yuav muaj ob txoj cai lub kaum sab xis . Feem ntau trapezoids muaj ob tug mob lub kaum sab xis (hauv qab 90 degrees ) thiab ob
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peb Ntawm no, dab tsi yog hom ntawm daim duab peb sab thiab lawv cov khoom? Qhov sum ntawm cov ces kaum hauv ib daim duab peb sab yog 180 °. Ib daim duab peb sab sib npaug muaj peb sab sib npaug thiab kaum. Daim duab peb sab isosceles tuaj yeem kos rau ntau txoj hauv kev.
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Yuav ua li cas koj pom cov ces kaum hauv parallelogram?
Properties of parallelograms Ob sab yog congruent (AB = DC). Cov tubtxib saum ntuj yog congruent (D = B). Lub kaum sab xis yog ntxiv (A + D = 180 °). Yog tias ib lub kaum sab xis yog, ces txhua lub kaum sab xis yog. Lub diagonals ntawm ib qho parallelogram bisect ib leeg. Txhua kab pheeb ces kaum ntawm parallelogram cais nws mus rau hauv ob daim duab peb sab