Respuesta :

devishri1977

Answer:

Step-by-step explanation:

10) ∠1 =  30   {corresponding angles are equal}

11) ∠4 = 30 { Alternate interior angles are equal}

12) ∠6 + 30 = 180   {straight line}

  ∠6 = 180 -30

∠6 =150

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