如图,\(AB\)是\(⊙O\)的直径,直线\(CD\)与\(⊙O\)相切于点\(C\),且与\(AB\)的延长线交于点\(E\),点\(C\)是\( \overparen {BF}\)的中点.
\((1)\)求证:\(AD⊥CD\);
\((2)\)若\(∠CAD=30^{\circ}\),\(⊙O\)的半径为\(3\),一只蚂蚁从点\(B\)出发,沿着\(BE-EC- \overparen {CB}\)爬回至点\(B\),求蚂蚁爬过的路程\((π≈3.14, \sqrt {3}≈1.73\),结果保留一位小数\()\).