Respuesta :

180-140=40 (complementary angle)
2z=40
Z=40/2
Z=20

Solution:

  • The sum of all the angles which stand on a straight line is 180°.
  • Therefore,
  • 2z + 140° = 180°
  • or, 2z = 180° - 140°
  • or, 2z = 40°
  • or, z = 40° ÷ 2
  • or, z = 20°

Answer:

z = 20°

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