1.

In figure, determine the value of x.

Answer»

The sum of all the angles around a point O is equal to 360°. 

Therefore, 3x + 3x + 150 + x = 360° 

7x = 360° – 150° 

7x = 210° 

x = 210/7 

x = 30° 

Hence, the value of x is 30°.



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