Problem 9 · 2016 Math Kangaroo
Medium
Spatial & Visual Reasoning
net-folding
The given net is folded along the dotted lines to form an open box. The box is placed on the table so that the opening is on top. Which side is facing the table?
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Answer: B — B
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Hint 1 of 2
Fold the net up in your head into an open box (one face missing for the opening).
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Hint 2 of 2
With the opening on top, the face opposite the opening is the one on the table.
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Approach: fold the net up and find the bottom face
- Fold the net up so the four sides stand and one face is missing; that missing face is the opening on top.
- The face that lies flat at the bottom, opposite the opening, is the one touching the table, which is B, choice (B).
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