A square sheet is folded along one diagonal (lower-left half up) and then along the other diagonal. One round hole is punched right on the second folded edge and a square hole inside. Which figure shows the opened sheet?

Question

Accepted Answer

(b). The hole on the second crease stays single when that fold opens; the square gets a twin. Opening the first diagonal fold then doubles everything across the other diagonal: two round holes and four squares: (b).

A square sheet is folded along one diagonal (lower-left half up) and then along the other diagonal. One round hole is punched right on the second folded edge and a square hole inside. Which figure shows the opened sheet?

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