8. AOB=180-BOD=180-130=50⁰
COD=180-AOC=180-145=35⁰
AOB+COD=50+35=85⁰
BOC=180-(AOB+COD)=180-85=95⁰
9. угол у=180-(40+90)=50⁰
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8. AOB=180-BOD=180-130=50⁰
COD=180-AOC=180-145=35⁰
AOB+COD=50+35=85⁰
BOC=180-(AOB+COD)=180-85=95⁰
9. угол у=180-(40+90)=50⁰