Vinod folds a square sheet left onto right and then top onto bottom. He cuts a small triangle off the corner of the folded square where both folded edges meet. Which figure shows the sheet opened?

Question

Accepted Answer

(d). That corner is the centre of the sheet. Opening the top-bottom fold mirrors the triangle upward, and opening the left-right fold mirrors both to the left. The four triangles meet at the centre and make one diamond-shaped hole: (d).

Vinod folds a square sheet left onto right and then top onto bottom. He cuts a small triangle off the corner of the folded square where both folded edges meet. Which figure shows the sheet opened?

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