Question 943961
Lug bolts are equally spaced about the wheel to form the equal angles. What is the measure of each of the equal obtuse angles?? 

Is the formula  
(n-2)x180 
_________=360
   n      

how do I solve that?
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The only obtuse angles are the interior angles.
For n sides, or n bolts, the Exterior angles are 360/n
Each obtuse (for n > 4) is 180 - Exterior angle.
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A formula for each obutse angle is 180 - (360/n) --- for n > 4