问prep的一个数学题

pengtiansh

For any triangle T in the xy-coordinate plane, the center of T is defined to be the point whose x-coordinate is the average (arithmetic mean) of the x-coordinates of the vertices of T and whose y-coordinate is the average of the y-coordinates of the vertices of T.  If a certain triangle has vertices at the points (0,0) and (6,0) and center at the point (3,2), what are the coordinates of the remaining vertex?

(A) (3,4)
(B) (3,6)
(C) (4,9)
(D) (6,4)
(E) (9,6)

这题答案说是C 我理解的题意　答案是B阿

tita

因为(0+6+X)/3=3,(0+0+Y)/3=2，所以（X,Y）=(3,6),答案B

maggie520

答案应该是B, 和ls解法一样~