SAT数学题（2007100912）Inthexy-plane,threeoftheverticesofasquareare(0,0)(0,3)and(3,0).Ifthesquareisreflectedabouttheliney=-x,whichofthefollowingisonevertexoftheresultingsquare?A(-3,-3)B(-3,3)C(0,3)D(3,-3)E(3,0)朋

Question

SAT数学题（2007100912）
In the xy-plane,three of the vertices of a square are (0,0) (0,3) and (3,0).If the square is reflected about the line y=-x,which of the following is one vertex of the resulting square?
A(-3,-3)
B(-3,3)
C(0,3)
D(3,-3)
E(3,0)
朋友们，正确答案我不缺，缺的是题意的理解，

Answer 1

就是说啊,在x、y坐标系中,一个正方形的三个顶点是 (0,0) (0,3) and (3,0),如果让这个正方形关于y=-x对称,那么下列哪个是得出的正方形的一个顶点的坐标?