16.(2020•安徽模拟)设OOO是ΔABC\Delta ABCΔABC所在平面上一点,点HHH是ΔABC\Delta ABCΔABC的垂心,满足OA→+OB→+OC→=OH→\overrightarrow{OA}+\overrightarrow{OB}+\overrightarrow{OC}=\overrightarrow{OH}OA+OB+OC=OH,且3⋅OA→+OB→+2⋅OC→=0→\sqrt{3}\centerdot \overrightarrow{OA}+\overrightarrow{OB}+\sqrt{2}\centerdot \overrightarrow{OC}=\overrightarrow 03⋅OA+OB+2⋅OC=0,则角AAA的大小是((( )))