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Find the angle x in the diagram above

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Mathematics WAEC 1998

Find the angle x in the diagram above

  • 310o
  • 230o
  • 190o
  • 130o checkmark
  • 100o

The correct answer is: D

Explanation

The given shape is a pentagon(5-sided polygon) = 540º

540º - ( 105º + 105º + 50º + 50º)  = yº

yº = 230º

But yº + xº = 360º ( <s at a point) and yº = 230º

xº = 360º - 230º = 130º

 

 

 

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