Problem 6 · 2017 Math Kangaroo
Easy
Spatial & Visual Reasoning
net-foldingreflectionsymmetry
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Answer: D
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Hint 1 of 2
Each fold doubles the holes by reflecting them across the fold line.
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Hint 2 of 2
Find the fold line that maps the two visible holes onto each other.
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Approach: reverse the fold by reflection
- Unfolding mirrors each punched hole across every fold line, so before unfolding the holes must be symmetric about the fold.
- Among the choices, only one dotted line is an axis of symmetry for the two holes shown.
- That fold line is choice D.
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