An equilateral triangle has an altitude length of 36 feet. Determine the length of a side of the triangle

Thank you for the opportunity to help you with your question!

the altitude face 60 degree angle in the right triangle, let the side be s, thus

sin (60 degrees) = 18/s

s= 36/sqrt(3) = 12*sqrt(3)

what does "sin" mean and how does it go from 60 degrees to 18/s

sin is trig function sine

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