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Three straight lines pass through a single point O, making 6 angles around it.
If the three angles on one side of any straight line through O are 40°, 70°, and °, find .

Class 7Adjacent and Vertically Opposite AnglesLines and Angles
  • A140
  • B77
  • C70
  • D63

Step-by-Step Solution

The three angles on one side of a straight line are adjacent and lie on a straight angle: , so °.
Answer: C) 70

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