M为AB上任意一点,C为AM中点,D为BM中点,AB=6,求CD的长因为c为AM中点所以CM=1/2( )( 的定义)又因为D为MB中点所以DM=12( ) ( 的定义)又因为AB=6所以CD=CM+DM=1/2( )+1/2( )= 1/2( )= ( )所以C
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![M为AB上任意一点,C为AM中点,D为BM中点,AB=6,求CD的长因为c为AM中点所以CM=1/2( )( 的定义)又因为D为MB中点所以DM=12( ) ( 的定义)又因为AB=6所以CD=CM+DM=1/2( )+1/2( )= 1/2( )= ( )所以C](/uploads/image/z/1261800-0-0.jpg?t=M%E4%B8%BAAB%E4%B8%8A%E4%BB%BB%E6%84%8F%E4%B8%80%E7%82%B9%2CC%E4%B8%BAAM%E4%B8%AD%E7%82%B9%2CD%E4%B8%BABM%E4%B8%AD%E7%82%B9%2CAB%3D6%2C%E6%B1%82CD%E7%9A%84%E9%95%BF%E5%9B%A0%E4%B8%BAc%E4%B8%BAAM%E4%B8%AD%E7%82%B9%E6%89%80%E4%BB%A5CM%3D1%2F2%EF%BC%88+%EF%BC%89%EF%BC%88+%E7%9A%84%E5%AE%9A%E4%B9%89%EF%BC%89%E5%8F%88%E5%9B%A0%E4%B8%BAD%E4%B8%BAMB%E4%B8%AD%E7%82%B9%E6%89%80%E4%BB%A5DM%3D12%EF%BC%88+%EF%BC%89+%EF%BC%88+%E7%9A%84%E5%AE%9A%E4%B9%89%EF%BC%89%E5%8F%88%E5%9B%A0%E4%B8%BAAB%3D6%E6%89%80%E4%BB%A5CD%3DCM%2BDM%3D1%2F2%EF%BC%88+%EF%BC%89%2B1%2F2%EF%BC%88+%EF%BC%89%3D+1%2F2%EF%BC%88+%EF%BC%89%3D+%EF%BC%88+%EF%BC%89%E6%89%80%E4%BB%A5C)
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