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Question -

In the figure, determine the value of x.



Answer -

In the figure
∠AOC + ∠COB + ∠BOD +∠AOD = 360 (angles at a point )
 
⇒ 3x + 3x + x + 150° = 360°
⇒ 7x – 360° – 150° = 210°
⇒ x == 30°
∴ x = 30°

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