Question

refer the above attachment

i) 15
ii) 30
iii) 45
iv) 60

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Answer 1

By reffering to the attachment,

4x + 2x = 180° ( Linear Pair )

6x = 180°

x = 30°

Extra:-

4x = Angle POR = 4x = 4×30° = 120°

2x = Angle QOR = 2x = 2×30° = 60°