As shown in the figure, given that point C is the midpoint of line AB, D is any point on AC, m and N are the midpoint of AD and DB respectively, if AB = 16, find the length of Mn
∵ point C is the midpoint of line AB, D is any point on AC, m and N are the midpoint of AD and DB respectively, ab = 16 ∵ AD + BD = AB = 16 ∵ Mn = MD + DN = 12 (AD + BD) = 8
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