Ib daim duab plaub raug suav hais tias yog qhov tshwj xeeb ntawm a parallelogramvim: … Ib lub duab plaub yog plaub plaub fab uas muaj 2 khub ntawm qhov sib txawv, sib npaug thiab sib luag tab sis kuj tsim cov kaum sab xis ntawm qhov nyob ib sab sab.
Dab tsi tshwj xeeb ntawm daim duab plaub?
Ib daim duab plaub yog 2D duab hauv geometry, muaj 4 sab thiab 4 fab. Nws ob sab sib ntsib ntawm lub kaum sab xis. Yog li, ib daim duab plaub muaj 4 lub kaum ntse ntse, txhua qhov ntsuas 90 ̊. Cov sab nraud ntawm ib daim duab plaub muaj qhov ntev thiab sib npaug.
Vim li cas daim duab plaub yog qhov tshwj xeeb parallelogram?
Txhua khub ntawm cov kaum sab hauv sab hauv yog ntxiv, vim tias ob lub kaum sab xis ntxiv rau lub kaum sab xis, yog li sab nraud ntawm daim duab plaub yog sib npaug Qhov no txhais tau hais tias daim duab plaub yog ib qho parallelogram, yog li: Nws cov sab nraud yog sib npaug thiab sib npaug. Nws kab pheeb ces kaum sib sib zog nqus.
Daim duab plaub yog hom tshwj xeeb ntawm dab tsi?
Ib daim duab plaub yog ib rooj plaub tshwj xeeb ntawm ib qho parallelogram uas txhua khub ntawm sab uas nyob ib sab yog perpendicular. Lub parallelogram yog ib qho tshwj xeeb ntawm lub trapezium (paub tias yog lub trapezoid nyob rau hauv North America) uas ob khub ntawm opposite sab yog parallel thiab sib npaug ntawm qhov ntev.
Vim li cas square tshwj xeeb?
Definition: Ib lub square yog quadrilateral nrog tag nrho plaub lub kaum sab xis thiab tag nrho plaub sab ntawm tib qhov ntev. Yog li lub square yog tshwj xeeb ntawm daim duab plaub, nws yog ib qho uas txhua sab muaj qhov ntev. Yog li txhua lub square yog ib daim duab plaub vim tias nws yog plaub plaub fab nrog tag nrho plaub lub kaum sab xis.
