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Video: Dab tsi yog peb yam khoom ntawm ib daim duab plaub?
2024 Tus sau: Miles Stephen | [email protected]. Kawg hloov kho: 2023-12-15 23:36
Ib daim duab plaub muaj peb yam khoom:
- Tag nrho cov lub kaum sab xis ntawm ib daim duab plaub yog 90 °
- Ob sab ntawm ib daim duab plaub yog sib npaug thiab Parallel.
- Diagonals ntawm ib daim duab plaub bisect ib leeg.
Ua kom pom qhov no, cov khoom ntawm cov duab plaub yog dab tsi?
Isogonal daim duab Convex polygon
Ib tug kuj yuav nug, dab tsi yog 7 yam khoom ntawm ib daim duab plaub? Cov ntsiab lus ntawm cov khoom
| S. No. | Khoom | Daim duab plaub |
|---|---|---|
| 5 | Diagonals yog congruent | ✓ |
| 6 | Diagonals yog perpendicular | ✕ |
| 7 | Diagonals sib sib zog nqus | ✓ |
| 8 | Cov ces kaum uas nyob ib sab yog ntxiv | ✓ |
Ib tug kuj yuav nug, dab tsi yog 4 yam khoom ntawm ib daim duab plaub?
Ob sab ntawm ib daim duab plaub yog tib qhov ntev (congruent). Cov lub kaum sab xis ntawm ib daim duab plaub yog tag nrho congruent (qhov loj me thiab ntsuas.) Nco ntsoov tias lub kaum sab xis 90 yog hu ua "lub kaum sab xis." Yog li, ib daim duab plaub muaj plaub txoj cai lub kaum sab xis . Tawm tsam lub kaum sab xis ntawm ib daim duab plaub yog congruent.
Yuav ua li cas koj daws cov khoom ntawm ib daim duab plaub?
Cov khoom ntawm Rectangles
- Cov duab plaub muaj plaub sab thiab plaub txoj cai (90∘) cov ces kaum.
- Qhov ntev ntawm sab nraud yog sib npaug.
- Lub perimeter, P, ntawm ib lub duab plaub yog qhov sib npaug ntawm ob zaug qhov ntev thiab ob zaug qhov dav. Saib thawj daim duab. P = 2L + 2W.
- Qhov cheeb tsam, A, ntawm ib daim duab plaub yog qhov ntev ntawm qhov dav. A = L⋅W.
Pom zoo:
Dab tsi yog equidistant los ntawm peb sab ntawm daim duab peb sab?
Lub ntsiab lus uas sib npaug rau txhua sab ntawm daim duab peb sab yog hu ua incenter: Ib qho nruab nrab yog ib qho kab uas muaj ib qho ntawm nws qhov kawg ntawm lub vertex ntawm daim duab peb sab thiab lwm qhov kawg ntawm qhov nruab nrab ntawm sab opposite lub vertex. Peb qhov nruab nrab ntawm ib daim duab peb sab sib ntsib hauv centroid
Vim li cas nws thiaj li hais tias lub Orthocenter ntawm daim duab peb sab obtuse yuav tsum nyob rau sab nraud ntawm daim duab peb sab?
Nws hloov tawm tias tag nrho peb qhov siab ib txwm sib tshuam ntawm tib lub ntsiab lus - lub npe hu ua orthocenter ntawm daim duab peb sab. Lub orthocenter tsis yog ib txwm nyob hauv daim duab peb sab. Yog tias daim duab peb sab yog obtuse, nws yuav nyob sab nraud. Txhawm rau ua kom qhov no tshwm sim cov kab qhov siab yuav tsum tau txuas ntxiv kom lawv hla
Dab tsi yog qhov txawv ntawm lub xeev daim duab kos duab thiab daim duab ua haujlwm?
Lub xeev daim duab qauv yog siv los qhia qhov sib lawv liag ntawm lub xeev uas ib yam khoom mus dhau, qhov ua rau kev hloov ntawm ib lub xeev mus rau lwm qhov thiab qhov kev txiav txim uas tshwm sim los ntawm lub xeev hloov. Daim duab ua haujlwm yog ntws ntawm kev ua haujlwm yam tsis muaj qhov tshwm sim (kev tshwm sim) mechanism, lub xeev tshuab yog suav nrog lub xeev triggered
Qhov twg ntawm cov plaub hau plaub hau yog ib txwm plaub hau plaub hau?
square Tsis tas li ntawd nug, qhov ntsuas ntawm ib lub quadrilateral tsis tu ncua yog dab tsi? Yog, sab hauv lub kaum sab xis ntawm txhua lub ces kaum ntawm ib lub quadrilateral tsis tu ncua yog txhua 90 degrees (360 degrees / 4 fab).
Dab tsi yog cov yam ntxwv ntawm daim duab plaub?
Cov duab plaub muaj cov khoom nram qab no: Tag nrho cov khoom ntawm ib qho parallelogram siv (cov uas tseem ceeb ntawm no yog cov kab sib dhos, cov sab nraud yog congruent, thiab diagonals bisect ib leeg). Tag nrho cov ces kaum yog kaum sab xis los ntawm kev txhais. Cov diagonals yog congruent