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Questions  

If A2,3,1B5,6,3C2,3,1 are the vertices of triangle ABC, the length of the median AD is

a
362
b
36
c
552
d
332

detailed solution

Correct option is D

The midpoint of the side  BC is D=72,32,2The length of the median  ADis AD=72−22+32−32+−1−22     =94+94+9      =332Therefore, the length of the median AD is  332

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