Priya folds a square sheet along its diagonal (top-right half onto the bottom-left half) and cuts a V-shaped piece out of the folded edge, as shown. Which figure shows the opened sheet?

Question

Accepted Answer

(d). The V has one side along the diagonal crease, so opening mirrors it in that diagonal: the triangle with corners (3, 3), (5, 5), (3, 5) gets the twin (3, 3), (5, 5), (5, 3). Together they make an upright square hole: (d).

Priya folds a square sheet along its diagonal (top-right half onto the bottom-left half) and cuts a V-shaped piece out of the folded edge, as shown. Which figure shows the opened sheet?

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