9-sonli umumiy o’rta maktabi sinf o’quvchisi

Tekshirdi D. Qaxxorov
2-nazorat ishi


Sana ­­­­­­­­­­­­­­­­­­­­­­­­_{–––––––––––––––––––––––––––––––––––}

1. 
   

1
6
3
^x
Rasmdagi ko’pburchaklarning o’xshashligi ma’lum bo’lsa, noma’lum uzunlikni
toping.

2. 
   AB va CD kesmalar O nuqtada kesishadi, AO=12 sm, BO=4 sm, CO=30 sm,
   

DO=10 sm bo’lsa, AOC va BOD uchburchaklar yuzlari nisbatini toping.

3. 
   ABC uchburchakning BD bissektrisasi uchburchakka tashqi chizilgan aylanani
   

B va P nuqtalarda kesadi. ABP = BDC ekanligini isbotlang.

4. 
   Ashrafning finjoni (qahva ichadigan idishi) balandligi 90 mm, asosining diametric
   

73 mm, ga eng. Qahvaga solingan shaker yoki sutni aralashtirish vaqtida Ashrafning qo’li kuymasligi uchun qoshiqchaning uzunligi kamida qancha bo’lishi kerak?

5. 
   Geometrik almashtirishlar va o’xshashlik deganda nimami tushunasiz?
   

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Savol №	1	2	3	4	5	Qo’shimcha savol	Jami ball
Ball