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Question

If the co-ordinates of the midpoints of the sides of a triangle are (1,1),(2,−3) and (3,4), then the centroid of the triangles is ______.

A
(3,13)
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B
(1,23)
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C
(3,1)
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D
(2,23)
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Solution

The correct option is D (2,23)
Let (X1,Y1),(X2,Y2),(X3,Y3) be the mid points of sides of triangle ABC

then co-ordinates of centroid are given by :

x=X1+X2+X33

y=Y1+Y2+Y33

Now as per the question

then co-ordinates of centroid are

x=1+2+33=2

y=13+43=23

(2,23) is co-ordinates of centroid.

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