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Ex 6.3, 1 - Chapter 6 Class 7 Triangle and its Properties - Part 2

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Ex 6.3, 1 (ii) Find the value of the unknown x in the following diagrams: Given, ∠P = 90 ° ∠Q = 30° ∠R = x We know, Sum of angles in triangles = 180° ∠P + ∠Q + ∠R = 180° 90° + 30° + x = 180° 120° + x = 180° x = 180° − 120° x = 60°

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