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

Asoslari 28 sm va 12 sm ga teng bo‘lgan trapetsiyaning diagonallari o‘rtala- rini tutashtiruvchi kesmaning uzunligini toping.

A) 8 sm; B) 10 sm; D) 6 sm; E) 7 sm.

7. 
   Trapetsiyaning diagonallari uning o‘rta chizig‘ini uchta teng bo‘lakka ajrat- sa, katta asosining kichik asosga nisbatini toping.
   

A) 2:1; B) 3:1; D) 5:2; E) 7:3.

8. 
   ABCD trapetsiyaning o‘rta chizig‘i uni o‘rta chiziqlari 13 sm va 17 sm ga teng bo‘lgan ikkita trapetsiyaga ajratadi. Trapetsiyaning katta asosini toping. A) 19 sm; B) 21 sm; D) 18 sm; E) 30 sm.
   
9. 
   Teng yonli trapetsiyaning kichik asosi 3 ga, perimetri 42 ga teng. Uning diagonali o‘tmas burchakni teng ikkiga bo‘ladi. Trapetsiyaning o‘rta chizi- g‘ini toping.
   

A) 8; B) 12; D) 8,5; E) 10.

10. 
    Trapetsiyaning diagonallari katta asosidagi burchaklarini teng ikkiga bo‘la- di. Trapetsiyaning o‘rta chizig‘i 11,7 ga, perimetri esa 36 ga teng. Tra­petsiya katta asosining uzunligini toping.
    

A) 18; B) 17,6; D) 17,1; E) 16,3.

11. 
    Berilgan: ZO, AB|| CD, OB = 6 sm, BD = 2,4 sm, AC = 2,2 sm. (92- rasm).