一道SAT数学inthexy-plane,thereoftheverticesofasquareare(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)

Question

一道SAT数学
in the xy-plane,there 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)

Answer 1

在xy平面内,一个正方形的三个顶点坐标分别是(0,0) (0,3)和 (3,0).若该正方形以y=-x为对称轴形成的另一正方形,下列哪一坐标位于形成的正方形中?大概意思就是这个了
解答就很简单了
有很多方法,
作图,直接的出来
二就是验证法,你a和d选项一样,应该有一个错了吧,（-3,-3）是正确答案