find the angles and explain it.
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here 120+a = 180. {interior angles on same side}
a=180-120
a= 60
a=b {vertically opposite angles}
b=60
a+e=180. { a straight line means the su. of two adjacent angles is 180.}
60+e=180
e=180-60
e=120.
a=180-120
a= 60
a=b {vertically opposite angles}
b=60
a+e=180. { a straight line means the su. of two adjacent angles is 180.}
60+e=180
e=180-60
e=120.
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