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The angles marked in the figure are measured in degrees. Find x.

Mathematics
JAMB 1980
The angles marked in the figure are measured in degrees. Find x.
  • A. 45o
  • B. 90o
  • C. 60o
  • D. 15o
  • E. 30o
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Correct Answer: Option E
Explanation
Sum of external angles = 360o

3x + 5x + x + 2x + x = 360o

12x = 360o

x = 30o
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