Center

Calculate the coordinates of the center of gravity T [x, y] of triangle ABC; A[11,4] B[13,-7] C[-17,-18].

Correct result:

x =  2.3
y =  -7

Solution:

$x = \dfrac{ 11 +13 -17}{3} = 2.3$

$y = \dfrac{ 4 -7 -18}{ 3} = -7$

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