N-gon II

What is the side length of the regular 9-gon circumscribed circle of radius 13 cm?

Final Answer:

a =  9.46 cm

Step-by-step explanation:

n=9 r=13 α=nπ=93.14160.3491 rad tan α = (a/2) : r  a=2 r tanα=2 13 tan0.3491=9.46 cm



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arithmeticplanimetricsgoniometry and trigonometryUnits of physical quantitiesGrade of the word problem

 
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