如图,在矩形纸片\(ABCD\)中,已知\(AB=1\),\(BC= \sqrt {3}\),点\(E\)在边\(CD\)上移动,连接\(AE\),将多边形\(ABCE\)沿直线\(AE\)翻折,得到多边形\(AB′C′E\),点\(B\)、\(C\)的对应点分别为点\(B′\)、\(C′\).
\((1)\)当\(B′C′\)恰好经过点\(D\)时\((\)如图\(1)\),求线段\(CE\)的长;
\((2)\)若\(B′C′\)分别交边\(AD\),\(CD\)于点\(F\),\(G\),且\(∠DAE=22.5^{\circ}(\)如图\(2)\),求\(\triangle DFG\)的面积;
\((3)\)在点\(E\)从点\(C\)移动到点\(D\)的过程中,求点\(C′\)运动的路径长.