3)FOE=90 градусов
4) 360-210=150
DOB=150
AOC=150
150=150=300
360-300=60
60/2=30
AOD=30
COB=30
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3)FOE=90 градусов
4) 360-210=150
DOB=150
AOC=150
150=150=300
360-300=60
60/2=30
AOD=30
COB=30