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Find the value of x in the diagram

Mathematics
WAEC 2002

Find the value of x in the diagram
  • A. 31o
  • B. 35o
  • C. 37o
  • D. 41o
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Correct Answer: Option B
Explanation
Sum of exterior angle of any polygon is 360o
(2x+5)o + 2xo + (x-20)o + xo + (3x+10)o + (x + 15)o = 360o; 10x = 350
x = 35

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