Txhua daim duab peb sab muaj peb qhov nruab nrab, ib qho los ntawm txhua qhov vertex, thiab lawv txhua tus sib tshuam ntawm daim duab peb sab centroid. Nyob rau hauv cov ntaub ntawv ntawm isosceles thiab equilateral daim duab peb sab, ib tug nruab nrab bisects ib lub kaum sab xis ntawm ib tug vertex uas nws ob sab nyob ib sab yog sib npaug zos nyob rau hauv ntev.
Puas nruab nrab ib txwm cuam tshuam?
Qhov nruab nrab ntawm daim duab peb sab yog ib ntu txuas nrog ib qho vertex mus rau nruab nrab ntawm sab nraud. Qhov nruab nrab ntawm ib daim duab peb sab yog concurrent (lawv sib tshuam hauv ib qho ntsiab lus). … Qhov nruab nrab ntawm daim duab peb sab yog ib txwm sib npaug ntawm sab hauv ntawm daim duab peb sab. Lub centroid faib cov nruab nrab rau hauv qhov sib piv 2: 1.
Puas nruab nrab ntawm daim duab peb sab sib ntsib ntawm ib qho taw tes?
Ib qhov nruab nrab ntawm daim duab peb sabyog qhov chaw uas peb qhov nruab nrab ntawm daim duab peb sab sib ntsib. … Lub centroid tseem hu ua qhov nruab nrab ntawm lub ntiajteb txawj nqus ntawm daim duab peb sab. Yog tias koj muaj daim duab peb sab, sim ntsuas lub phaj ntawm koj tus ntiv tes. Thaum koj pom lub ntsiab lus uas nws yuav sib npaug, qhov ntawd yog qhov nruab nrab ntawm daim duab peb sab.
Dab tsi yog qhov kev sib tshuam ntawm qhov nruab nrab ntawm daim duab peb sab?
Median Theorem hais tias qhov nruab nrab ntawm daim duab peb sab sib tshuam ntawm ib qho chaw hu ua the centroid uas yog ob feem peb ntawm qhov kev ncua deb ntawm qhov vertices mus rau nruab nrab ntawm sab nraud..
Puas yog qhov nruab nrab ntawm daim duab peb sab sab nraum daim duab peb sab?
Yog koj pom nruab nrab ntawm ib sab ntawm ibdaim duab peb sab, koj tau pom nws qhov nruab nrab. Los ntawm qhov nruab nrab, koj tuaj yeem tsim qhov kab ntu mus rau sab hauv lub kaum sab xis. Txoj kab tsim los ntawm qhov nruab nrab ntawm ib sab mus rau lub kaum sab xis sab hauv yog qhov nruab nrab.
