Prezident Maktablariga tayyorgarlik repetitsion sinov test. Matematika! B daraja!

A) 2a/b

B)2a/3b

C) 3b/2a

D) 2b/3a

12. Uzunliklari 3 sm, 4 sm , 5 sm, 7 sm bo`lgan kesmalardan nechta uchburchak yasash mumkin ? *

12 баллов

A) 5

B) 2

C) 3

D) 4

13. Tog`ri to`rtburchakning eni 8 sm ga teng, bo`yi undan 2 sm ga ortiq bo`lsa, uning perimetrini toping. *

21 балл

A) 24 sm

B) 28 sm

C) 36 sm

D) 20 sm

14. Uchburchakning tomonlari 7 sm, 11 sm, 8 sm ga teng. Uchlari shu uchburchak tomonlarining o`rtalarida yotgan uchburchak perimetrini toping. *

21 балл

A) 13 sm

B) 16 sm

C) 22 sm

D) 26 sm

15. To`rtburchak 3 ta burchagi yig`indisi 280gradus. To`rtinchi burchagiga qo`shni bo`lgan burchakning qiymatini toping. *

21 балл

A) 80gr

B) 70gr

C)100gr

D)110gr

16. Uchburchakning ikkita burchaklari 20 gr va 60gr ga teng bo`lsa, uning noma’lum burchagini toping. *

21 балл

A) 100gr

B)20gr

C)80gr

120gr

17. Agar uchburchakning A, B va C burchaklari 4; 5 va 6 sonlariga proporsional bo`lsa, A burchakni toping. *

21 балл

A)60gr

B)30gr

C)48gr

D)72gr

18.Teng yonli uchburchakning asosi yon tomonidan 2 sm ga qisqa. Agar uchburchakning perimetri 19 sm bo`lsa, asosining uzunligi necha santimetrga teng? *

21 балл

A) 4

B) 5

C ) 6

D) 7

*

21 балл

A



B



C



D

*

21 балл

A



B