A square sheet is folded along the diagonal from top-left to bottom-right (upper-right half down), and then along the other diagonal (lower-right half up), leaving a small triangle. A square and a round hole are punched. Which figure shows the opened sheet?

Question

Accepted Answer

(b). Undo the second fold: each hole gets a twin across the top-right to bottom-left diagonal. Undo the first: all four get twins across the other diagonal. So each shape appears four times, once in each of the four triangles the diagonals make: (b).

A square sheet is folded along the diagonal from top-left to bottom-right (upper-right half down), and then along the other diagonal (lower-right half up), leaving a small triangle. A square and a round hole are punched. Which figure shows the opened sheet?

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