geometrik figuralarni turli belgilari bóyicha guruhlash
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слайд 1 mavzu: geometrik figuralarni turli belgilari bóyicha guruhlash uchburchaklar bir tekislikda yotma-gan uchta nuqtani tutashtirish natijasida uchburchak hosil bo’ladi. uchburchaklar tomonlari yoki burchaklariga qarab nomlanadi. masalan: teng yonli, teng tomonli, turli tomonli yoki o’tkir burchakli, o’tmas burchakli, to’g’ri burchakli kabi. uchburchak s= ½*ah= =½ *ab sina = =pr=abc/4r= = p(p-a)(p-b)(p-c) p=(a+b+c)/2 r- ichki chizilgan aylananing radiusi. r- tashqi chizilgan aylananing radiusi. a b c a c b uchburchak a/sinα=b/sin β=c/sin γ =2r a²=b²+c²-2bc cos α m=1/2* 2b²+2c² -a² m- mediana l=2/(b+c) bcp(p-a) h=2s/a α β γ a c b to’g’ri burchakli uchburchak burchaklaridan biri 90° bo’lgan uchburchak to’g’ri burchakli uchburchak deyiladi. a²+b²=c² m=c/2 s= ½*ab=1/2*hc r=c/2 r=(a+b-c)/2 ...
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