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In the figure, find the value of x

Mathematics
JAMB 1987

In the figure, find the value of x
  • A. 110o
  • B. 100o
  • C. 90o
  • D. 80o
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Correct Answer: Option C
Explanation
Z = X = Y = 180o .........(i)

2Z + Y + Y = 190 = 2Z + 2Y = 180

Z + Y = 90o........(ii)

hence x + (z + y) = 180

x + 90o = 180o

x = 180o - 90o

= 90o

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