Cov txheej txheem:
Video: Kev tsim daim duab peb sab yog dab tsi?
2024 Tus sau: Miles Stephen | [email protected]. Kawg hloov kho: 2023-12-15 23:36
A daim duab peb sab muaj peb sab thiab peb lub kaum sab xis. Peb ua tau tsim a daim duab peb sab thaum peb paub qee qhov kev ntsuas, uas yog, nws sab, nws cov ces kaum, lossis qee qhov ntawm nws sab thiab kaum.
Ua ke, tsim ib daim duab peb sab txhais li cas?
Nplooj ntawv no qhia yuav ua li cas tsim ib daim duab peb sab muab qhov ntev ntawm tag nrho peb sab, nrog compass thiab straightedge los yog kav. Nws ua haujlwm los ntawm thawj zaug luam ib qho ntawm cov kab ntu los ua ib sab ntawm cov daim duab peb sab . Tom qab ntawd nws pom qhov thib peb vertex los ntawm qhov twg ob lub arcs sib tshuam ntawm qhov kev ncua deb ntawm txhua qhov kawg ntawm nws.
Dab tsi yog hom ntawm daim duab peb sab?
- Qhov sum ntawm cov ces kaum hauv ib daim duab peb sab yog 180 °.
- Ib daim duab peb sab sib npaug muaj peb sab sib npaug thiab kaum.
- Daim duab peb sab isosceles tuaj yeem kos rau ntau txoj hauv kev.
- Daim duab peb sab txoj cai muaj ib lub kaum 90 °.
- Ib daim duab peb sab scalene muaj peb lub kaum sib txawv thiab tsis muaj ib sab ntawm qhov sib npaug ntawm qhov ntev.
Yog li ntawd, dab tsi yog ib daim duab peb sab?
Ob lub kaum sab xis thiab txhua sab mob txiav txim siab a cim daim duab peb sab . Vim tias qhov xwm txheej muaj ob txoj kev sib txawv, peb cais nws ua ob yam: ob lub kaum sab xis thiab suav nrog sab mob thiab ob lub kaum sab xis thiab sab tawm ntawm lub kaum sab xis.
Yuav ua li cas koj tsim ib lub duab plaub?
Piv txwv li, ntawm no yog ib txoj hauv kev los tsim ib lub duab plaub:
- Xaiv cov ntsiab lus tsis txaus ntseeg A thiab B hauv lub dav hlau thiab kos ntu AB.
- Nce perpendicular m rau AB ntawm A.
- Nce perpendicular n rau AB ntawm B.
- Xaiv ib qho kev txiav txim siab C ntawm kab n.
- Tso ib qho perpendicular ntawm point C mus rau kab m.
- Tom qab ntawd quadrilateral ABCD yog ib daim duab plaub.
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