题目如图,边长为222的正方形ABCDABCDABCD绕点AAA逆时针旋转454545度后得到正方形AB′C′D′AB'C'D'AB′C′D′,边B′C′B'C'B′C′与DCDCDC交于点OOO,则四边形AB′ODAB'ODAB′OD的周长是 ______ .知识点:正方形的性质,旋转的基本性质章节:未标注