SOLUTION: A square cube has a side length of 3. What is the length of a diagonal that cuts through the center of the cube?

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Question 1007315: A square cube has a side length of 3. What is the length of a diagonal that cuts through the center of the cube?
Answer by It is costly(175) About Me  (Show Source):
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given:side of the cube=3, find the diagonal?
d²=s²+s²+s²
d²=3s²
√[d²]=√[3s²]
d=±s√3
d=+s√3
d=[3√3] or d=[5.196152423]