SOLUTION: The visual shows the net of an open cube. The area of the net is 45 square centimetres, what is the length of one side of the cube?

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Question 662248: The visual shows the net of an open cube. The area of the net is 45 square centimetres, what is the length of one side of the cube?
Answer by KMST(5328) About Me  (Show Source):
You can put this solution on YOUR website!
I imagine that by "an open cube" the problem means an open cube-shaped box, with 5 faces, but missing the lid.
If that net shows 5 squares, for 5 congruent faces of a cube,each having the same area, the surface area of each face is
45cm%5E2%2F5=9cm%5E2
The area of a face in a cube with side x cm is x%5E2 cm%5E2, so in this case
x%5E2=9 --> x=sqrt%289%29 --> highlight%28x=3%29
The side of the cube measures highlight%283cm%29.