2. A By plotting the points, it is easy to check that $B C D E$ is a square. Since any three vertices of a square determine the fourth vertex, it is impossible to make a square using three of these points and the point $A$.
2. Four of the following points are vertices of the same square. Which point is not a vertex of this square?
A $(-1,3)$
B $(0,-4)$
C $(-2,-1)$
$\mathrm{D}(1,1)$
$\mathrm{E}(3,-2)$