Matematika v–102

12. 
    Quyidagi tasdiqlardan qaysilari noto’g’ri?
    

1. 
   piramidaning hajmi asosining yuzi bilan balandligi ko’paytmasining uch baravariga teng;
   
2. 
   silindrning hajmi asosining yuzi bilan balandligining ko’paytmasiga teng;
   
3. 
   sharning hajmi ga teng;
   
4. 
   asosining radiusi R ga, yasovchisi l ga teng konus yon sirtining yuzi ga teng.
   
5. 
   Radiusi R ga, segmentining balandligi H ga teng bo’lgan shar segmentining hajmi ga teng ;