The length of a diagonal of a square sandbox is 9 feet. What is the approximate length of one side of the sandbox?

Question

Help me 

Answer 1

Bob,

 

Let the length of side be x feet

 

The 2 sides are equal and they make a right angle with the diagonal as the hypotenuse

 

So x^2 + x^2 = 9^2

2x^2 = 81

x^2 = 40.5

x = 6.364 feet