Forum - المخروط الدوراني

المخروط الدوراني

المخروط الدوراني

 

 

 

تعريف مخروط دوراني

المخروط الدوراني هو مجسم مولد بدوران مثلث قائم الزاوية

                            حول ضلع من ضلعي الزاوية القائمة

 

نشر مخروط دوراني

كيف تصنع مخروط دوراني       ◄     


 

 

حجم مخروط دوراني

V = \frac{1}{3}\pi r^2\times h                   
    أنظر فيديو    ◄
 
المساحة الجانبية  
 
A  =  r. a .π
 
المساحة الكلية
A = \pi r (r+a)\,,
أنظر فيديو     

عامد مخروط دوراني

 
a = \sqrt{r^2 + h^2}

لنقارن حجمي مخروط دوراني و أسطوانة

 

Base by Height Formula Picture

مثال

الحجم

  volume cône

العامد

a =  √ (32 + 82) = 73

لمساحة الجانبية

A = 3 x 73 x π

لمساحة الكلية

 At = 3 x 73 x  π  +  32xπ

تمارين        

 


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