Posted by **math** on Friday, October 8, 2010 at 5:04pm.

You build a box that is 4 feet long, 5 feet wide, and 8 feet high. The distance from the top left front corner to the top right back corner is ______.

I tried

a²= 4² + 5²

a²= 41

d² = 41 + 8²

d²= 105

d=+- 10.25

is this right?

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