作图题(保留痕迹,不写作法) 如图,在10×5的正方形网格中,每个小正方形边长均为单位1,将△ABC向右平移4个单位,得到△A 1 B 1 C 1 ,再把△A 1 B 1 C 1 绕点A 1 按逆时针方向旋转90°得到△A 2 B 2 C 2 ,请画出△A 1 B 1 C 1 和△A 2 B 2 C 2 .
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