Step-by-step explanation:
m<2: 65°( vertically opposite angle)
m<3: 180°-65°=115°(sum of straight line)
m<4: 180°- 65° = 115° (sum of straight line)
Draw a line between 5 and 6.
m<5: 180°- m<7=180-115=65
m<7 = m<4=115°(corresponding angle)
m<8 = m<5 =65°(vertically opposite angle)
m<6=m<7=115°( vertically opposite angle)
in this way 10,11,12 will be find.
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