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Folding a paper square along one diagonal (lower-left half up) and then the other, Alok gets a small triangle. He cuts a tiny notch from the middle of its long edge. Which figure shows the opened square?

Competition practicePaper Folding & Punching
  • A(a)
  • B(c)
  • C(b)
  • D(d)

Step-by-Step Solution

The long edge of the small triangle is the middle of the sheet's right edge. Undo the second fold: the notch is copied to the middle of the top edge. Undo the first: both are copied to the bottom and left edges. A notch in the middle of every edge: (b).
Answer: C) (b)

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