1) AOB=180°-(OAB+OBA)=180°-(25°+30°)=180°-55°=125°;
2) AOC=180°-(OAC+OCA)=180°-(25°+35°)=180°-60°=120°;
3) BOC=180°-(OCB+OBC)=180°-(35°+30°)=180°-65°=115°.
Все по св-ву биссектрисы...
1) AOB=180°-(OAB+OBA)=180°-(25°+30°)=180°-55°=125°;
2) AOC=180°-(OAC+OCA)=180°-(25°+35°)=180°-60°=120°;
3) BOC=180°-(OCB+OBC)=180°-(35°+30°)=180°-65°=115°.
Все по св-ву биссектрисы...