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DᴀʀᴋPᴀʀᴀᴅᴏx

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In the given figure, if the lines p and q are parallel then the angles 4 and 1 form the pair of co - interior Angles that sum upto 180°,

so,

  • [tex] \angle4 + \angle1 = 180[/tex]
  • [tex]\angle1 + 125 = 180[/tex]
  • [tex]\angle1 = 180 - 125[/tex]
  • [tex]\angle1 = 55 \degree[/tex]