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Question

If A(2,2),B(4,4),C(5,8) are the vertices of any triangle, then the length of median passing through C will be:

A
65
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B
117
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C
85
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D
113
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Solution

The correct option is C 85
A median of a triangle is a line segment that joins the vertex of a triangle to the midpoint of the opposite side.
Median passing through C will pass through mid point of AB.

Mid point of two points (x1,y1) and (x2,y2) is calculated by the formula (x1+x22,y1+y22)

Using this formula, mid point of AB=(242,242)=(1,1)


Distance between two points (x1,y1) and (x2,y2) can be calculated using the formula (x2x1)2+(y2y1)2
Distance between the points C(5,8) and (1,1)=(15)2+(1+8)2=36+49=85


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