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Calculate the value of Y in the diagram

Mathematics
WAEC 1999

Calculate the value of Y in the diagram

  • A. 18o
  • B. 42o
  • C. 48o
  • D. 132o
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Correct Answer: Option C
Explanation

x = 180° - 123° = 57°

z = 180° - 105° = 75°

y = 180° - 57° - 75° = 48°


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