1 8-sinf geom yangi. 1-8-bet. 2015(boshi). p65

A) 75°; B) 150°; D) 105°; E) 60°.

8. 
   To‘g‘ri to‘rtburchakning eni 5 ga teng, bo‘yi undan 7 ga ortiq. Shu to‘g‘ri to‘rtburchakning perimetrini toping.
   

A) 34; B) 32; D) 26; E) 30.

9. 
   To‘g‘ri to‘rtburchakning perimetri 32 ga, qo‘shni tomonlarining ayirmasi 2 ga teng. Uning tomonlarini toping.
   

A) 8 va 6; B) 12 va 10; D) 9 va 7; E) 11 va 9.

10. 
    Rombning diagonali tomoni bilan 25° li burchak tashkil qiladi. Rombning katta burchagini toping.
    

A) 130°; B) 150°; D) 120°; E) 115°.

11. 
    Trapetsiyaning uchta tomoni 4 sm dan, to‘rtinchi tomoni esa 8 sm. Tra­petsiyaning eng katta burchagini toping.
    

A) 140°; B) 120°; D) 150°; E) 60°.

12. 
    ABCD trapetsiyada AC diagonal CD yon tomonga perpendikular. Agar FD = 72° va AB = BC bo‘lsa, FABC ni toping.
    

A) 150°; B) 144°; D) 136°; E) 108°.

F74

А