угол AOB(ab)
D—биссектриса AOC(ac)
AOB=80°
BOD(bd)—?
BOC=COA=1/2×AOB=1/2 × 80° =40°
DOC=1/2COA=1/2×40°=20°
BOD(bd)=BOC+DOC=80°+20°=100°
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угол AOB(ab)
D—биссектриса AOC(ac)
AOB=80°
BOD(bd)—?
BOC=COA=1/2×AOB=1/2 × 80° =40°
DOC=1/2COA=1/2×40°=20°
BOD(bd)=BOC+DOC=80°+20°=100°