画线段AB,在AB的延长线上取一点C,使BC=2AB,再在BA的延长线上取一点D,使DA=AB,取AB中点E,若DE=6

画线段AB,在AB的延长线上取一点C,使BC=2AB,再在BA的延长线上取一点D,使DA=AB,取AB中点E,若DE=6 画线段AB,在AB的延长线上取一点C,使BC＝2AB,再在BA的延长线上取一点D,使DA＝AB,取AB中点E,若DE=6 画线段AB,在AB的延长线上取一点C使BC=2AB,再在BA的延长线上取一点D,使DA=AB;再在AB中取一点E,且DE 画线段AB,在AB的延长线上取一点C,BC=二分之一AB,再在BA的延长线上取一点D,使DA=2AB,取AB的中点,若D 已知线段AB,在AB的延长线上取一点C,BC=2AB,再在BA的延长线上取一点D,使DA=AB,取AB中点E,使DE等于 画线段AB,在AB的延长线上取一点C,使BC=2AB,再在BA的延长线上取一点D. 已知线段AB,在AB的延长线上取一点C,使BC=2AB,再在BA的延长线上取一点D,使DA=AB,取AB的中点E, 已知线段AB,在AB的延长线上取一点C,使BC=AB,在BA的延长线上取一点D,使DA=2AB. 画线段AB,在AB的延长线上取一点C,使BC=2AB. 已知线段AB，在AB的延长线上取一点C，使BC=3AB，在BA的延长线上取一点D，使DA=2AB，E是DB的中点，且EB 已知线段AB,在AB的延长线上取一点C,使BC=AB,在BA的延长线上取一点D,使DA=2AB,E是DB中点,且EB=3 已知线段AB,AB的延长线上取一点C,使BC=2AB,在BA的延长线上取一点D,使DA=2分之3AB,E是DB的中点=3