9-sonli umumiy o’rta maktabi sinf o’quvchisi
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9-sinf geometriya nazorat daftari
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Tekshirdi D. Qaxxorov
5-nazorat ishi Sana ––––––––––––––––––––––––––––––––––– Tomoni 6 sm bo’lgan muntazam uchburchakka tashqi chizilgan aylana uzunligini toping. Ikkita burchagi mos ravishda 30 va 45 bo’lgan uchburchak burchaklarining radian o’lchovlarini toping. Sirk arenasi aylanasining uzunligi 41 m. Arena radiusi va yuzini toping. Yoyning gradus o’lchovi 72 bo’lgan sektorning yuzi 45 ga teng. Sektor radius toping Aylana yoyi burchakning radian o’lchovi deganda nimani tushunasiz. 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