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2+3+1=180°
1)2+100°=180°
2=180°-100°
2=80°
2)35°=1
Entonces
2+3+1=180°
80°+3+35°=180°
3+115°=180°
3=180°-115°
3=65°
1=35°
2=80°
3=65°
3)b
1=120°
120°+2+3=180°
2+3=60°
3+160°=180°
3=20°
2+20°=60°
2=40°
1=120°
2=40°
3=20°
:DD