2.
如图,\(\triangle ABC\)的顶点都在方格纸的格点上.
\((1)\)画出\(\triangle ABC\)关于直线\(MN\)的对称图形\(\triangle A_{1}B_{1}C_{1}\);
\((2)\)画出\(\triangle ABC\)关于点\(O\)的中心对称图形\(\triangle A_{2}B_{2}C_{2}\);
\((3)\)画出\(\triangle ABC\)绕点\(B\)逆时针旋转\(90^{\circ}\)后的图形\(\triangle A_{3}BC_{3}\).