Matematika 8-sinf uchun. Test №1

A)72⁰;108⁰ B)60⁰;120⁰ C)30⁰;150⁰ D)50⁰;130⁰ E)62⁰;118⁰

17. Qo’shni burchaklardan biri ikkinchisidan 16⁰ katta . Shu qo’shni burchaklarni toping .

A)16⁰;164⁰ B)80⁰;96⁰ C)148⁰;32⁰ D)82⁰;98⁰ E)62⁰;118⁰

18. Ikki parallel to’g’ri chiziqni uchinchi to’g’ri chiziq kesib o’tganda , hosil bo’lgan ichki bir tomonli burchaklardan biri ikkinchisidan 60⁰ ga kichik . Shu burchaklardan kattasini toping .

A)120⁰ B)110⁰ C)118⁰ D)130⁰ E)100⁰

19. Peremetri 24 bo’lgan uchburchakning balandligi uni peremetrlari 14 va 18 bo’lgan ikkita uchburchakka ajratadi .Berilgan uchbuchakni balandligini toping .

A)10 B)8 C)6 D)4 E)3

20. Uchburchakning tomonlari o’rtalarini tutashtirib, perimetri 65 ga teng bo’lgan uchburchak hosil qilindi . Berilgan uchburchakning perimetrini toping .

A)32,5 B)260 C)75 D)195 E)130

21. Uchburchakning ikkita tashqi burchagi yig’indisi 240⁰ ga teng . Uning shu burchaklariga qo’shni bo’lmagan ichki burchagini toping .

A)30⁰ B)45⁰ C)90⁰ D)75⁰ E)60⁰

22. Trapetsiyaning asoslari 4 va 10 ga teng uning diagonallari o’rtasini tutashtiruvchi kesmaning uzunligini toping.