Question
The figure shows a piece of square paper PQRS folded at two of its corners P and R. Given that ∠PST = 12° and ∠RSU = 18°, find ∠PSR.
2 m

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The figure shows a piece of square paper PQRS folded at two of its corners P and R. Given that ∠PST = 12° and ∠RSU = 18°, find ∠PSR.