2024 Tus sau: Elizabeth Oswald | [email protected]. Kawg hloov kho: 2024-01-13 00:07
Ib daim duab plaub yog parallelogram nrog plaub lub kaum sab xis, yog li tag nrho cov duab plaub kuj yog parallelograms thiab quadrilaterals.
Puas lub duab plaub puas muaj plaub lub kaum sab xis?
Ib daim duab plaub yog plaub fab nrog 4 txoj cai kaum(90 °). Nyob rau hauv ib lub duab plaub, ob khub ntawm opposite sab yog parallel thiab sib npaug ntawm qhov ntev. Cov khoom ntawm cov duab plaub: Txhua lub kaum sab xis yog kaum sab xis.
Lub kaum sab xis muaj pes tsawg tus duab plaub?
a quadrilateral nrog plaub txoj cai kaum. ib quadrilateral qhov twg ob kab pheeb ces kaum sib npaug ntawm qhov ntev thiab bisect ib leeg.
Puas cov duab plaub tag nrho muaj cov kaum sab xis?
Yes, tag nrho cov duab plaub muaj kaum sab xis.
Dab tsi yog qhov zoo li 4 lub kaum sab xis?
Ib daim duab plaub yog ib lub plaub fab uas muaj 4 lub kaum sab xis. Ib daim duab nrog plaub sab ntawm qhov sib npaug. Cov duab muaj ob pawg ntawm qhov sib npaug sab thiab muaj plaub lub kaum sab xis. Daim duab plaub sab.
Pom zoo:
Puas yog kab pheeb ces kaum txiav lub kaum sab xis ib nrab?
Txhua kab pheeb ces kaum faib ib lub ces kaum mus rau ob lub ces kaum. Nco ntsoov tias cov kab pheeb ces kaum sib npaug thiab txiav ib nrab ntawm cov ces kaum sab xis. Puas diagonal bisect an angle? kab pheeb ces kaum bisect the angles.
Puas yog plaub lub plaub fab puas muaj plaub lub kaum obtuse?
A quadrilateral tsis tuaj yeem muaj plaub lub kaum obtuse. Lub kaum sab xis yog qhov ntsuas siab dua 90 degrees thiab qis dua 180 degrees. Puas yog plaub fab muaj 4 lub kaum obtuse piav? A quadrilateral tsis tuaj yeem muaj plaub lub kaum obtuse.
Lub kaum sab xis twg tuaj yeem tsim daim duab peb sab?
Daim duab peb sab kuj tuaj yeem raug cais los ntawm lawv cov kaum. Hauv daim duab peb sab mob daim duab peb sab tag nrho peb lub kaum sab xis yog mob (tsawg dua 90 degrees). Daim duab peb sab txoj cai muaj ib lub kaum sab xis thiab ob lub kaum sab xis.
Leej twg ntau lub kaum sab xis muaj plaub npaug?
A quadrilateral yog polygon uas muaj plaub sab. (Qhov no kuj txhais tau hais tias lub quadrilateral muaj raws nraim plaub vertices, thiab raws nraim plaub lub kaum.) Puas tag nrho cov plaub fab muaj 4 lub kaum? Txhua plaub plaub fab muaj 4 sab, 4 vertices, thiab 4 lub kaum ntse ntse.
Lub kaum sab xis yog daim duab peb sab?
Triangle angle sum theorem: Qhov no hais tias cov lej ntawm tag nrho peb lub kaum sab hauv sab hauv Lub kaum sab xis Nyob rau hauv geometry, lub kaum sab hauv ntawm daim duab peb sab yog cov kaum sab xis uas tsim hauv daim duab peb sab. Cov ces kaum sab hauv muaj cov khoom nram qab no:
