Matematika 8-sinf uchun. Test №1

A)55⁰ B)80⁰ C)60⁰ D)52⁰ E)78⁰

18. Ikki parallel to’g’ri chiziqmi uchinchi to’g’ri

chiziq kesib o’tganda hosil bo’lgan ichki bir

tomonli burchaklardan biri ikkinchisidan 17 marta

kichik . Shu burchaklardan kichigini toping .

A)20⁰ B)24⁰ C)15⁰ D)10⁰ E)18⁰

19. Uchburchakning ikkita burchagi qiymatlarining nisbati 1:2 kabi . Uchinchi burchagi shu burchaklarning kichigidan 40⁰ ga katta . Uchburchakning katta burchagini toping .

A)102⁰ B)93⁰ C)75⁰ D)80⁰ E)105⁰

20. To’g’ri burchakli uchburchak katetlaridan biri

12 sm , gipotenuzasi esa ikkinchi katetdan 6 sm

uzun. Gipotenuzaning To’g’ri burchakli

uchburchak uzunligini toping.