please solve in this picture 1st question
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/_1= /_3 (vertically opposite angle)
/_1+/_2=180 (linear pair)
30+/_2=180
/_2=180-30
=150
Therefore
/_2=150
/_3=30
Therefore
angle 1+ angle2 =180 ( By LPA)
30 + angle 2=180
angle2=180-30
angle2=150°
again
angle 2+ angle 3=180
150° + angle 3=180
angle3 =180 -150
angle 3 =30°