I chorak algebra – sinf – nazorat ishi Yozma ish I variant

II variant

1. Minoradan tekis yerga 24 m soya tushdi. Yerga tik qo’yilgan, uzunligi 12,5dm bo’lgan xodadan shu vaqtda 8,1 dm soya tushdi. Minora balandligini aniqlang.

1) 375 dm 2) 3,75 dm 3)37,5 dm 4)27,5 dm

2. O’xshash ko’pburchaklarning perimetrlari nisbati 2:3 kabi. Agar ikkinchi ko’pburchakning kichik tomoni 36 mm bo’lsa, birinchi ko’pburchakning kichik tomoni uzunligini aniqlang.

1) 54 mm 2) 59 mm 3) 69 mm 4) 96 mm

3. Uchburchakning ikki tomoni 3 sm va 4 sm, ular orasidagi burchagi 30^о gat eng. Uchburchakning yuzini toping.

1) 3 2) 6 3) 4 4) 2

4. Uzunligi 20 m bo’lgan narvon uy devorining tepasiga li burchak ostida tiralgan. Narvonning asosi devordan qanday masofada joylashgan.

1) 16 m 2) 15 m 3) 12 m 4) 10 m

5. Uchburchakning ikki tomoni 5 sm va 8 sm, ular orasidagi burchagi 60^о ga teng. Uchburchakning uchinchi tomonini toping.

1) 2 sm 2) sm 3) sm 4) 4 sm

6. Aylanasining uzunligi 785 mm bo’lgan shaybaning radiusini toping.

1) 126 mm 2) 125 mm 3) 124 mm 4) 127 mm

7. Sirk arenasining aylanasi uzunligi 263 m. Arenaning yuzini toping.

1)5539 m ² 2)5639 m ² 3)5559 m ² 4)5549 m ²_.