已知线段AB,在AB延长线上取一点C,使BC=3AB.在BA延长线上取一点D,使DA=3/2AB,E是DB中点且EB=30cm,求CD的长
问题描述:
已知线段AB,在AB延长线上取一点C,使BC=3AB.在BA延长线上取一点D,使DA=3/2AB,E是DB中点且EB=30cm,求CD的长
答
已知线段AB,在AB延长线上取一点C,使BC=3AB.在BA延长线上取一点D,使DA=3/2AB,E是DB中点且EB=30cm,求CD的长