Q. 123.5( 4 Votes )

# If the origin is

Answer :

Since, centroid of a triangle is found by The points are A(a,1,3) and B(-2, b, -5), and its centroid is (0, 0, 0) and its third vertex C(4,7,c).

Using the formula, we get  Equating it with the coordinates of centroid, we get a = -2 b = -8

and, c = 2

therefore, a= -2, b= -8, c=2.

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