Video: Dab tsi muaj ib lub kaum sab xis?
2024 Tus sau: Miles Stephen | [email protected]. Kawg hloov kho: 2023-12-15 23:36
Ib txoj cai daim duab peb sab yog a peb sab puab nrog ib lub kaum sab xis thiab ob lub kaum sab xis. Ib mob hnyav lub kaum sab xis yog lub kaum sab xis uas ntsuas qis dua 90 degrees.
Kuj tseem paub yog, dab tsi quadrilateral tsuas muaj ib lub kaum sab xis xwb?
| Lub npe Quadrilateral | Kev piav qhia |
|---|---|
| Daim duab plaub | 2 khub ntawm parallel sab. 4 lub kaum sab xis (90 °). Cov sab nraud yog sib npaug thiab sib npaug. Tag nrho cov ces kaum yog congruent. |
| Square | 4 sib sib zog nqus. 4 lub kaum sab xis (90 °). Cov sab nraud yog sib npaug. Txhua lub kaum sab xis yog congruent. |
| Trapezoid | Tsuas yog ib khub ntawm opposite sab yog parallel. |
Tsis tas li ntawd, dab tsi yog lub polygon nrog ib lub kaum sab xis? Txoj cai cov ces kaum feem ntau yog nyob rau hauv squares thiab rectangles. Tau kawg ib co polygons tsuas muaj ib lub kaum sab xis ,or ob. Kuj tseem muaj ob peb hom quadrilaterals, suav nrog lub xwmfab, lub duab plaub, thiab lub trapezoid.
Kuj paub, lub rhombus puas muaj tib lub kaum sab xis?
Vim nws yog ib tug parallelogram, opposite ces kaum yog congruent. Thiab vim hais tias nws yog quadrilateral qhov sum ntawm tag nrho cov ces kaum yuav tsum = 360 degrees. Yog li ntawd yog tias ib ang yog txoj cai ces qhov opposite lub kaum sab xis yog 90 degree. Los yog rhombus tuaj yeem muaj tsis muaj txoj cai ces kaum, nws yuav xwb ua a rhombus.
Puas muaj ib qho parallelogram tsuas muaj ib lub kaum sab xis xwb?
A parallelogram nrog ib lub kaum sab xis yog a parallelogram nrog 4 txoj cai cov ces kaum, tseem hu ua ib lub duab plaub. Txhua khub ntawm qhov sib npaug ntev sab yuav tsum ua nyob sib ze. Txhua yam koj paub yog tias daim duab muaj plaub sab. Yog li ntawd, nws yog ib tug general quadrilateral.
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