The roof of a grain silo is to be made using 12 identical triangular panels. Determine the value of angle θ needed and the smallest value of d that can be used.

Question

Robert · Accepted Answer

Look from the front  
The projection can be drawn as (only one panel is drawn)
   The horizontal distance is 4 ft because the 
minimum value of the horizontal distance must be 4 ft  
to cover the cylinder  
Therefore  
? =  √42 + 22 =  √20 ?? 
The perimeter of the cylinder is  
? =  ?

The roof of a grain silo is to be made using 12 identical triangular panels. Determine the value of angle θ needed and the smallest value of d that can be used.

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