Ib daim duab peb sab isosceles yog ib hom duab peb sab uas muaj ob sab uas ntev tib yam. Ob lub cim cim yog ob qho tib si ntev. Ob lub kaum sab nraud ntawm ob lub cim no kuj zoo ib yam: ob lub ces kaum yog 70 °.
Dab tsi yog lub kaum sab xis isosceles?
Ob sab sib npaug ntawm daim duab peb sab isosceles yog ob txhais ceg thiab sab thib peb yog lub hauv paus. Lub kaum sab xis ntawm qhov sib npaug yog hu ua lub kaum sab xis. Tag nrho cov ces kaum yuav tsum sib npaug 180 degrees thaum ntxiv ua ke.
Puas yog daim duab peb sab isosceles mob lossis obtuse?
Txhua daim duab peb sab isosceles muaj ib qho axis ntawm symmetry raws lub perpendicular bisector ntawm nws lub hauv paus. Ob lub kaum sab nraud ntawm ob txhais ceg sib npaug thiab ib txwm mob, yog li kev faib tawm ntawm daim duab peb sab ua mob, sab xis, lossis obtuse tsuas yog nyob ntawm lub kaum sab xis ntawm nws ob txhais ceg.
Puas yog obtuse kaum sab xis?
Ib daim duab peb sab sib npaug yog ib txwm sib npaug (saib hauv qab). Hauv daim duab peb sab isosceles, ob sab yog tib qhov ntev. Ib daim duab peb sab isosceles yuav yog, obtuse, lossis mob (saib hauv qab).
Isosceles kaum sab lossis sab?
Tswv lus. Hauv daim duab peb sab isosceles, ob sab sib npaug yog hu ua ob txhais ceg, thiab sab seem yog hu ua lub hauv paus. Lub kaum sab xis ntawm lub hauv paus yog hu ua lub kaum sab xis, thiab lub ntsiab lus cuam tshuam nrog lub kaum sab xis yog hu ua apex. Lub ob lub kaum sib npaug yog hu ua lub kaum sab xis.