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Answer:
∠ 1 = 46°
Explanation:
∠ PQS is formed by ∠ PQR and ∠ SQR , that is
∠ PQR + ∠ SQR = ∠ PQS
∠ 2 + ∠ 1 = ∠ PQS ( substitute values )
99° + ∠ 1 = 145° ( subtract 99° from both sides )
∠ 1 = 145° - 99° = 46°
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