InrightFig,ifthelengthofthesegmentABis1,
问题:
In right Fig,if the length of the segment AB is 1,M is the midpoint of the segment AB,and point C divides the segment MB into two partssuch that MC:CB=1:2,then the length of AC is______.
(英汉词典:length长度;segment线段;midpoint中点;divides…into分为,分成)