Если луч OC – биссектриса \(\angle\) AOB, то

• \(\angle\) AOC = \(\angle\) BOC.
• \(\angle\) AOB = \(\angle\) AOC + \(\angle\) BOC.
• \(\angle\) AOC = \(\angle\) AOB.
• \(\angle\) AOB = \(\angle\) BOC.