A:1:3
B:3:1
C:1: 3
D:3 :1
①请直接写出A1的坐标,并画出△A1B1C1
②P(a,b)是△ABC的AC边上一点,将△ABC平移后点P的对称点P'(a+2,b﹣6),请画出平移后的△A2B2C2.
③若△A1B1C1和△A2B2C2关于某一点成中心对称,求对称中心的坐标
诉讼有哪些类型?各有什么特点?
Legend has it that the origin of the Dragon Boat Festival is to the soul of Qu Yuan.