Ib daim duab plaub yog ib qho parallelogram nrog plaub lub kaum sab xis, yog li txhua daim duab plaub kuj tseem yog parallelograms thiab quadrilaterals. Ntawm qhov tod tes, tsis yog txhua qhov quadrilaterals thiab parallelograms yog cov duab plaub. Ib daim duab plaub muaj tag nrho cov khoom ntawm ib qho parallelogram, ntxiv rau cov hauv qab no: Cov kab pheeb ces kaum yog congruent.
Puas yog daim duab plaub ib plaub plaub muaj lossis tsis yog?
Yes. Ib daim duab plaub yog plaub plaub fab nrog 4 lub kaum sab xis. … Ib tug parallelogram yog ib lub quadrilateral nrog 2 khub ntawm parallel sab. Cov sab nraud ntawm txhua qhov square yog sib npaug, yog li txhua square yog parallelogram.
Puas yog square thiab duab plaub yog plaub fab?
Vim tias ob lub xwmfab thiab ib daim duab plaub muaj qhov sib npaug ntawm sab, piv txwv li, 4, peb tuaj yeem xaus tias ob lub xwmfab thiab duab plaub yog quadrilaterals.
Puas yog daim duab plaub ib plaub fab lossis sib npaug?
Ib qho equilateral quadrilateral, i.e. ib qho nrog txhua sab sib npaug, yog lub rhombus. Nyob rau hauv ib lub xwmfab, duab plaub, los yog rhombus, cov kab rov tav yog sib npaug. Ib lub quadrilateral nrog cov kab rov tav kab sib dhos yog hu ua parallelogram.
Puas yog plaub npaug nrog 4 lub kaum ib daim duab plaub?
Ib daim duab plaub yog ib lub plaub fab uas muaj plaub lub kaum sab xis. Yog li, tag nrho cov kaum hauv ib lub duab plaub sib npaug (360 ° / 4=90 °). Ntxiv mus, qhov opposite sab ntawm ib daim duab plaub yog parallel thiab sib npaug, thiab diagonals bisect ib leeg.
