线段AB,在AB延长线上取点C,使BC=2AB,M是BC中点,若AB=30,求BM长kkkkkkkkkkkkkkkkk现在立刻马上要

问题描述:

线段AB,在AB延长线上取点C,使BC=2AB,M是BC中点,若AB=30,求BM长
kkkkkkkkkkkkkkkkk现在立刻马上要

15

AB=BM=MC=1/2AB=30