Nyob rau hauv txhua daim duab peb sab, sab shortest yog opposite lub kaum tsawg tshaj plaws thiab lub ntev sab yog opposite lub kaum loj tshaj.
Puas yog daim duab peb sab scalene qhov ntev tshaj plaws yog opposite lub kaum sab xis nrog qhov loj tshaj plaws ntsuas?
Nco ntsoov tias hauv daim duab peb sab scalene, txhua sab muaj qhov ntev sib txawv thiab txhua lub kaum sab hauv muaj qhov ntsuas sib txawv. Nyob rau hauv xws li ib daim duab peb sab, lub shortest sab yog ib txwm opposite lub me tshaj lub kaum sab xis. (Cov no yog qhia nyob rau hauv bold xim saum toj no) Ib yam li ntawd, sab ntev yog opposite lub kaum loj tshaj plaws.
Dab tsi yog sab ntawm daim duab peb sab scalene hu ua?
Ib daim duab peb sab yog scalene yog tias tag nrho nws peb sabsib txawv (qhov twg, peb lub ces kaum kuj txawv). Yog tias ob ntawm nws sab sib npaug, daim duab peb sab hu ua isosceles. Daim duab peb sab uas muaj peb sab sib npaug yog hu ua equilateral.
Koj ua li cas txiav txim siab qhov ntev tshaj plaws ntawm daim duab peb sab?
Sab ntev tshaj plaws nyob rau hauv daim duab peb sab yog tawm tsam lub kaum loj tshaj plaws, thiab sab luv tshaj yog ntxeev lub kaum me tshaj.
Vim li cas sab ntev ntawm daim duab peb sab yog lub kaum sab xis loj tshaj?
Raws li koj twv, lub kaum loj tshaj plaws yuav yog tawm tsam 18 vim nws yog sab ntev tshaj. … Theorem: Yog tias ib sab ntawm daim duab peb sab ntev dua li lwm sab, ces lub kaum sab nraud ntawm sab ntev yuav loj dua lub kaum sab nraud ntawm sab luv.
