Ответ:
1.x+(x+40)= 180
2x+40= 180
2x=140
x=70(град) BOC
2.180-70=110(град)AOB
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Ответ:
1.x+(x+40)= 180
2x+40= 180
2x=140
x=70(град) BOC
2.180-70=110(град)AOB