Yog li, qhov suav ntawm cov kaum sab hauv sab hauv cov kaum sab xis. Lub kaum sab xis ntawm lub kaum sab xis feem ntau ntsuas ntawm sab hauv ntawm lub vertex. Rau ib qho yooj yim n-gon, qhov sib npaug ntawm cov ces kaum sab hauv yog π (n − 2) radians lossis 180 (n − 2) degrees. https://en.wikipedia.org › wiki › Vertex_angle
Vertex angle - Wikipedia
ntawm ib lub plaub fab yog 360 degrees. Txhua sab yog tib qhov ntev (congruent) thiab tag nrho cov kaum sab hauv yog tib qhov loj (congruent).
Puas lub kaum sab xis ntxiv txog 360?
Quadrilaterals yog tsim los ntawm ob daim duab peb sab. Pom raws li peb paub cov lej ntawm cov kaum sab hauv ntawm daim duab peb sab yog 180 °, nws ua raws li cov sum ntawm cov kaum sab hauv ntawm lub plaub fab yog 360 °.
Puas muaj pes tsawg degrees yog ib lub plaub fab sib npaug?
Cov sum ntawm cov kaum sab hauv ntawm lub plaub fab yog360 °
Pob rhombus muaj 4 lub kaum sab xis?
Yog tias koj muaj lub rhombus nrog plaub lub kaum sab hauv sib npaug, koj muaj a square. Lub square yog ib qho tshwj xeeb ntawm lub rhombus, vim hais tias nws muaj plaub qhov sib npaug-ntev sab thiab mus rau saum toj thiab tshaj ntawd kom muaj plaub lub kaum sab xis. Txhua square koj pom yuav yog lub rhombus, tab sis tsis yog txhua lub rhombus koj ntsib yuav yog square.
30 60 90 daim duab peb sab yog dab tsi?
Kev piav qhia: Ina 30-60-90 txoj cai daim duab peb sab sab shortest uas yog opposite 30 degree kaum yog ib nrab ntawm covhypotenuse.
