M在AB上,N在BC上,折叠后B却落在DC上,这不可能,你题目写错了
我感觉M应该在AD上吧,这样才说得通,AM=2
计算有些复杂…不能放图片就讲不清楚了…
对折后B对应B`,B`C=3,得BB`=3根10,BN=5,CN=4
AM=9-4-3=2…
一个正方形ABCD,边长为9,M点在AB边上,N点在BC边上,沿MN折叠,点B落在DC上,BC=3,求AM的长.
一个正方形ABCD,边长为9,M点在AB边上,N点在BC边上,沿MN折叠,点B落在DC上,BC=3,求AM的长.
我错了,是B点落在DC边上时,设对应点为B',B'C=3,M点在AD上,我知道AM=2,
我错了,是B点落在DC边上时,设对应点为B',B'C=3,M点在AD上,我知道AM=2,
数学人气:589 ℃时间:2019-11-10 19:02:45
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