Answer:
7. 47°+90°+2°=180°
137°+2°=180°
2°=180°-137°
3°=43°
90°+<bda=180
<bda=180-90
<bda=90°
63+90+1=180
153+1=180
1=180-153
1°=27°
8. 2=60°
3=60°
60+1=180
1=180-60
1°=120°
4.5m questions
5.9m answers