Question 1079698
 A window is in the shape of an equilateral triangle with a height of 12ft.
 To the nearest tenth of a foot, how long are the sides of the triangle?
:
let s = the side of the triangle
Use pythag
{{{s^2 =(.5s)^2 + 12^2 }}}
{{{s^2 = .25s^2 + 144 }}}  
{{{s^2 - .25s^2 = 144 }}}
{{{.75s^2 = 144 }}} 
{{{s^2 = 144/.75 }}}
{{{s^2 = 192}}}
{{{s = sqrt(192)}}}
s = 13.9 ft