Ib lub rhombus yog hom parallelogram, thiab qhov txawv ntawm nws cov duab yog tias tag nrho plaub ntawm nws sab yog congruent. Tag nrho 4 sab yog concrudent. Diagonals bisect vertex kaum. Diagonals yog perpendicular.
Pob rhombus puas muaj ob kab pheeb suab?
Lub rhombus muaj cov khoom nram qab no:
Txhua sab yog congruent los ntawm txhais. Cov diagonals bisect cov ces kaum. Cov kab pheeb ces kaum yog perpendicular bisectors ntawm ib leeg.
Puas yog lub rhombus muaj 4 kab sib dhos sib dhos?
Nws yog ib hom tshwj xeeb ntawm parallelogram, thiab nws cov khoom (sib nrug los ntawm cov khoom ntawm parallelograms) suav nrog: Nws kab pheeb ces kaum faib cov duab rau hauv 4 daim duab peb sabNws cov diagonals yog perpendicular bisectors ntawm ib leeg. Yog hais tias tag nrho ntawm lub rhombus 'lub kaum sab xis yog kaum sab xis, ces lub rhombus yog square.
Dab tsi zoo muaj kab pheeb ces kaum?
Ib qho parallelogram nrog kab pheeb ces kaum yuav tsum yog duab plaub. Qee cov rhombuses yog cov duab plaub. Lub diagonals ntawm lub rhombus yog congruent.
Dab tsi ib txwm muaj kab pheeb ces kaum sib npaug?
Kev piav qhia: Nco ntsoov tias duab plaub thiab squareskuj tseem muaj cov kab pheeb suab sib dhos, tab sis ib qho isosceles trapezoid yog lub ntsiab lus dav dav rau txhua qhov muaj peev xwm, txij li cov duab plaub thiab squares yog isosceles trapezoids hauv Ntxiv nrog rau qhov muaj lawv cov khoom tshwj xeeb.
