Lub parallelogram yog ib lub quadrilateral nyob rau hauv uas ob khub ntawm opposite sab yog parallel. … Cov sab nraud yog congruent; Cov ces kaum uas nyob ib sab yog ntxiv; Cov diagonals sib sib zog nqus.
Ntawm no, ntau npaum li cas opposite sab yog ib tug parallelogram? Ib tug parallelogram muaj plaub sab tag nrho thiab ob khub ntawm sab uas yog parallel. Lub square yog lub parallelogram uas muaj plaub sab sib npaug. Cov sab nraud yog sib npaug thiab tag nrho cov ces kaum ntawm square tsim ib lub kaum sab xis. Ib daim duab plaub yog ib qho parallelogram uas muaj plaub qhov opposite, parallel, congruent sab.
Puas yog sab nraud ntawm ib qho parallelogram ib txwm sib luag? Basic Properties ntawm Parallelograms
Yuav pib nrog cov kev cai yooj yim, opposite sab ntawm ib tug parallelogram yeej ib txwm sib npaug ntev thiab parallel. Nyob rau hauv ib qho parallelogram, cov ces kaum sib txawv yeej ib txwm sib haum xeeb. Lub kaum sab xis uas nyob ib sab yog ib txwm ntxiv (ntxiv rau 180 degrees).
Ntxiv thiab, Yuav ua li cas koj ua pov thawj opposite sab ntawm ib tug parallelogram yog sib npaug? Ua pov thawj: Cov sab nraud yog sib npaug, AB = CD and BC = AD . Hauv parallelogram ABCD, sib piv cov duab peb sab ABC thiab CDA. Hauv cov duab peb sab: AC = CA (ib sab)
...
Peb muaj:
- RE = EQ.
- ET = PE (Diagonals bisect ib leeg)
- ∠RET = ∠PEQ (vertically opposite ces kaum).
Yuav ua li cas koj daws qhov opposite sab ntawm ib tug congruent parallelogram?
Yuav ua li cas koj pom cov ces kaum ntawm lub parallelogram?
Puas yog cov ces kaum bisected hauv parallelogram? Tag nrho cov khoom ntawm ib qho parallelogram siv (cov uas tseem ceeb ntawm no yog cov kab sib dhos, cov kaum sab nraud yog qhov sib koom, thiab cov ces kaum sib law liag yog ntxiv). … Cov kab pheeb ces kaum bisect cov ces kaum.
Puas yog sab nraud ntawm ib qho parallelogram yog qhov sib npaug? Nyob rau hauv parallelogram, txhua khub ntawm opposite sab yog ntawm vaj huam sib luag ntev. ...
Yuav ua li cas koj pom lwm sab ntawm parallelogram?
Muaj rau qhov tseem ceeb ntawm parallelograms kom paub:
- Cov sab nraud 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 tug parallelogram bisect ib leeg.
Puas yog parallelogram muaj 4 qhov sib npaug? Ib tug parallelogram nrog 4 sib npaug sab yog a rhombus.
Vim li cas lub kaum sab xis ntawm parallelogram sib npaug?
Lub kaum sab xis ntawm ib qho Parallelogram yog sib npaug
Muab: Parallelogram ABCD. Peb paub tias cov ces kaum sab hauv yog sib npaug. Los ntawm ASA congruence criterion, ob daim duab peb sab yog congruent rau ib leeg. Yog li ntawd, nws tau ua pov thawj tias cov kaum sab xis ntawm lub parallelogram yog sib npaug.
Yuav ua li cas koj pom ob sab ntawm parallelogram?
Puas yog parallelograms muaj congruent opposite ces kaum?
Yog hais tias lub quadrilateral yog parallelogram, ces nws opposite ces kaum yog congruent. Yog hais tias lub quadrilateral yog ib tug parallelogram, ces nws cov kab pheeb ces kaum bisect ib leeg. Yog hais tias lub quadrilateral yog parallelogram, ces kaum sib law liag yog ntxiv.
Cov kaum sab xis puas sib haum?
Rov qab Angles. Cov kaum sab nraud yog cov kaum sab xis uas tsis nyob ib sab uas tsim los ntawm ob txoj kab sib tshuam. Cov kaum sab xis yog concruent (sib npaug hauv kev ntsuas).
Dab tsi yog ob sab ntawm parallelogram? Ib qho parallelogram yog ob sab. Nws muaj plaub sab, nyob rau hauv uas ob khub ntawm sab yog parallel. Tsis tas li ntawd, cov kab sib dhos yog sib npaug ntawm qhov ntev. Yog tias qhov ntev ntawm qhov sib npaug ntawm qhov sib npaug tsis sib npaug hauv kev ntsuas, ces cov duab tsis yog parallelogram.
Koj ua pov thawj li cas 8.3 Theorem?
Vim li cas kite tsis yog parallelogram?
Kites yog hom tshwj xeeb ntawm quadrilateral nrog ob qho sib txawv ntawm ob sab sib law liag tib qhov ntev. … Ib yam li ntawd, txhua lub kite tsis yog ib qho parallelogram, vim hais tias cov opposite sab ntawm ib tug kite tsis tas yuav parallel.
Yam khoom twg ntawm ib qho parallelogram yog siv los nrhiav qhov ntsuas ntawm nws lub kaum sab xis? Lub kaum sab xis muaj Pob kws
Txhawm rau paub seb koj lub quadrilateral yog ib qho parallelogram, koj tuaj yeem tawm koj tus protractor thiab ntsuas txhua lub kaum sab xis. Lub kaum sab xis ntawm ib leeg yuav muaj qhov ntsuas tib yam. Nws yog qhov tshwm sim rau ib qho parallelogram kom muaj ob lub kaum ntse ntse thiab obtuse kaum sab xis.
Yuav ua li cas koj nrhiav tau plaub sab ntawm ib parallelogram?
Peb paub hais tias cov opposite sab ntawm ib tug parallelogram yog sib npaug zos rau ib leeg. Yog li, AB = CD thiab BC = AD. x = 9 y = 4. Li no, plaub vertex yog (9,4).
Qhov twg quadrilateral yog parallelogram nrog 4 sib npaug sab? Parallelogram: Ib lub quadrilateral nrog 2 khub ntawm qhov sib luag. Rectangle: Ib qho parallelogram nrog 4 lub kaum sab xis. Rhombuses: Ib qho parallelogram nrog 4 sab nrog ntev sib npaug.
Puas yog ob sab ntawm parallelogram sib npaug?
Lub parallelogram yog quadrilateral nrog opposite sab parallel (thiab yog li ntawd cov ces kaum sib npaug). Lub quadrilateral nrog sib npaug sab yog hu ua rhombus, thiab ib qho parallelogram uas nws cov ces kaum yog tag nrho cov ces kaum yog hu ua lub duab plaub.
Muaj pes tsawg lub kaum sab xis ntawm parallelogram? Lub kaum sab xis ntawm ib qho Parallelogram yog sib npaug
Muab: ABCD yog parallelogram, nrog plaub lub kaum ∠A, ∠B, ∠C, ∠D. Qhov no muab ∠B = ∠D los ntawm CPCT (qhov sib thooj ntawm daim duab peb sab). Ib yam li ntawd, peb tuaj yeem qhia tau tias ∠A = ∠C. Li no ua pov thawj, cov ces kaum sib txawv hauv ib qho parallelogram sib npaug.
Dab tsi yog qhov sib npaug ntawm cov kaum sab xis nyob rau hauv parallelogram?
Peb paub, cov ces kaum rov qab nyob rau hauv parallelogram yog sib npaug. Cia ib lub kaum sab xis yog x°. Muab Cov Ntaub Ntawv - Qhov sib npaug ntawm ob lub kaum sab nraud ntawm ib qho parallelogram yog 130 °. Peb paub tias cov lej ntawm tag nrho cov kaum sab xis nyob rau hauv parallelogram yog 360 °.
Puas yog parallelogram sab sib npaug? Ib qho parallelogram yog ib lub quadrilateral nrog cov sab nraud sib luag (thiab yog li ntawd opposite ces kaum sib npaug). Lub quadrilateral nrog sib npaug sab yog hu ua rhombus, thiab ib qho parallelogram uas nws cov ces kaum yog tag nrho cov ces kaum yog hu ua lub duab plaub.
Dab tsi ua rau cov kaum sab xis nyob rau hauv parallelogram ntxiv rau?
Lub kaum sab xis ntawm lub parallelogram yog congruent (sib npaug). Ntawm no, ∠A = ∠C; ∠D = ∠B. Tag nrho cov ces kaum ntawm parallelogram ntxiv mus 360 °.
Dab tsi yog ob lub kaum sab xis ntawm lub parallelogram?
Ib qho parallelogram txhais tau hais tias yog plaub lub kaum sab xis uas ob sab nraud yog sib npaug. Ib qho ntawm cov khoom ntawm parallelograms yog tias cov kaum sab nraud yog congruent, raws li peb tam sim no yuav qhia.