已知线段AB,延长线上取C,使BC=3AB,在AB延长线上取一点D,使AD=1.5AB,E为DB中点,且EB=30cm,求CD的长.

问题描述:

已知线段AB,延长线上取C,使BC=3AB,在AB延长线上取一点D,使AD=1.5AB,E为DB中点,且EB=30cm,求CD的长.

300cm