Question 804546
The area of an equilateral triangle is 1 mile^2. Find its side length. 
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Side length = s
h = (s/2)/cos(60)
or h = sqrt(s^2 - (s/2)^2)
Either way, h = s*sqrt(3)/2
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Area = b*h/2
= s*s*sqrt(3)/4 = 1
s^2 = 4/sqrt(3)
{{{s = 2/root(4,3)}}}
s =~ 1.51937 miles