Theorem: Cov txiaj ntsig ntawm kev ntsuas ntawm cov kaum sab hauv sab hauv lub kaum sab xis Kev ntsuas ntawm lub kaum sab nrauv ntawm lub vertex tsis cuam tshuam los ntawm qhov twg yog txuas ntxiv: ob lub kaum sab nrauv uas tuaj yeem tsim ntawm ib qho vertex los ntawm kev sib txuas ua ke ntawm ib sab lossis lwm qhov yog cov kaum sab xis thiab yog li sib npaug. https://en.wikipedia.org › wiki › Internal_and_external_angles
kaum sab hauv thiab sab nraud - Wikipedia
ntawm daim duab peb sab yog 180°.
Dab tsi yog daim duab peb sab sum theorem siv rau?
Daim duab peb sab sum Theorem muaj txiaj ntsig zoo thaum nrhiav ploj lub kaum sab xis ntsuas sab hauv ntawm daim duab peb sab. Qhov kev xav no hais tias cov lej ntawm cov kaum sab hauv ntawm ib daim duab peb sab yuav sib npaug 180 degrees.
30 60 90 daim duab peb sab yog dab tsi?
Thiab li ntawd. Lub sab opposite lub kaum sab xis 30 ° yog qhov tsawg tshaj plaws, vim 30 degrees yog lub kaum sab xis me tshaj. Sab nraub qaum ntawm 60 ° lub kaum sab xis yuav yog qhov nruab nrab ntev, vim tias 60 ° yog lub kaum sab xis ntawm qhov nruab nrab ntawm daim duab peb sab.
5 theorems yog dab tsi?
Tshwj xeeb, nws tau txais txiaj ntsig los ua pov thawj tsib lub theorems hauv qab no: (1) lub voj voog yog bisected los ntawm ib txoj kab uas hla; (2) lub hauv paus kaum ntawm daim duab peb sab isosceles sib npaug; (3) qhov opposite (" ntsug") lub kaum sab xis tsim los ntawm kev sib tshuam ntawm ob kab yog sib npaug; (4) ob daim duab peb sab yog congruent (ntawm cov duab sib npaug thiab loj…
Dab tsi yog qhov suav ntawm lub kaum sab xis ntawm daim duab peb sab?
Tus lej ntawm peb lub kaum ntawm ib daim duab peb sab yog sib npaug 180 degrees.
