图一把长方形ABCD折叠使D点落在BC边上的点F处若AB=12cmBC=13求EC的长要快啊给还有要详细
问题描述:
图一把长方形ABCD折叠使D点落在BC边上的点F处若AB=12cmBC=13求EC的长要快啊给还有要详细
答
where is "E" and "图一"
图一把长方形ABCD折叠使D点落在BC边上的点F处若AB=12cmBC=13求EC的长要快啊给还有要详细
where is "E" and "图一"