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A carpenter in Pune nails two flat strips so they cross like the letter X. He measures the smaller angle of the crossing as 52°.
List the four angles of the crossing in order around the point, starting from the 52° angle.

Class 9Linear Pair and Vertically Opposite AnglesGeometry — Lines and Angles
  • A52, 128, 52, 128
  • B52, 52, 128, 128
  • C52, 90, 52, 90
  • D52, 138, 52, 138

Step-by-Step Solution

Adjacent angle = 180 - 52 = 128 (linear pair); vertically opposite repeats. Going around: 52, 128, 52, 128.
Answer: A) 52, 128, 52, 128

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