prep-math

-math

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-coordinate of the vertices and 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?

 answer3.6)

都没看明白题目什么意思?

就是坐标系中的一个三角形的中点被定义为：其X坐标为三个顶点X坐标的mean。Y坐标为三个顶点Y坐标的mean。

则3=0+6+x/3，则x=3；2=0+0+y/3，则y=6.