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M is the midpoint of the line AB, n is a point on the line am, if Mn = 4, find the value of bn-an
BN-AN=(BM+MN)-(AM-MN)
Because m is the midpoint, BM = am
So = 2 * Mn = 2 * 4 = 8
As shown in the figure, given line AB, m and N are two points on AB, and C and D are the midpoint of line am and BN respectively. (1) if AB = 26cm, Mn = 10cm,
So AB Mn = 16
Yes, C and D are the midpoint of line segment am and BN respectively, so divide by 2 to calculate the length of CD as 8cm
（26-10）/2=8
If AB = a, C is any point of AB and Mn is the midpoint of AC and BC respectively, then Mn=______ +______ =______ AC+______ BC=______ ．
According to the figure and the meaning of the title: Mn = MC + CN = 12ac + 12bc = 12ab = 12a
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