A triangle has a vertex at (1, 2) and the mid points of the two sides through it are (-1, 1) and (2, 3). Then the centroid of this triangle is:

\(\left( {\frac{1}{3},{\rm{\;}}1} \right)\)

\(\left( {1,\;\frac{7}{3}} \right)\)

\(\left( {\frac{1}{3},{\rm{\;}}2} \right)\)

\(\left( {\frac{1}{3},{\rm{\;}}\frac{5}{3}} \right)\)

A triangle has a vertex at (1, 2) and the mid points of the two sides

1.	A triangle has a vertex at (1, 2) and the mid points of the two sides through it are (-1, 1) and (2, 3). Then the centroid of this triangle is:
A.	\(\left( {1,\;\frac{7}{3}} \right)\)
B.	\(\left( {\frac{1}{3},{\rm{\;}}2} \right)\)
C.	\(\left( {\frac{1}{3},{\rm{\;}}1} \right)\)
D.	\(\left( {\frac{1}{3},{\rm{\;}}\frac{5}{3}} \right)\)
Answer» C. \(\left( {\frac{1}{3},{\rm{\;}}1} \right)\)

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A triangle has a vertex at (1, 2) and the mid points of the two sides through it are (-1, 1) and (2, 3). Then the centroid of this triangle is:

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