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In the diagram, calculate the value of x

Mathematics
WAEC 2002

In the diagram, calculate the value of x

  • A. 35o
  • B. 80o
  • C. 100o
  • D. 115o
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Correct Answer: Option C
Explanation

From the diagram above.

115º = A  (corresponding angles)

t + 115º  = 180° ( sum of <s on a straight line)

t = 180º - 115º = 65º

x = 35º + 65º = 100º ( ext. <s of a triangle = the sum of the two opposite interior <s)


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