23.在等邊△ABC中,線段AM為BC邊上的中線.點(diǎn)D在直線AM上,以CD為一邊在CD的下方作等邊△CDE,連接BE.
(1)當(dāng)點(diǎn)D在線段AM上時(shí),
①請(qǐng)?jiān)趫D1中補(bǔ)全圖形;
②∠CAM的度數(shù)為
;
③求證:△ADC≌△BEC.
(2)當(dāng)點(diǎn)D在直線AM上時(shí),直線BE與直線AM的交點(diǎn)為O(點(diǎn)D與點(diǎn)M不重合,點(diǎn)E與點(diǎn)O不重合),直接寫出線段OE,OM,DM與BE的數(shù)量關(guān)系.