①以原點(diǎn)O為對(duì)稱(chēng)中心,畫(huà)出△ABC關(guān)于原點(diǎn)O對(duì)稱(chēng)的△A1B1C1 , 并寫(xiě)出B1的坐標(biāo);
②再把△A1B1C1繞點(diǎn)C1 , 順時(shí)針旋轉(zhuǎn)90°,得到△A2B2C2 , 請(qǐng)你畫(huà)出△A2B2C2 , 并寫(xiě)出B2的坐標(biāo).
如圖所示,在△ABC中,∠C=90°,AC=6cm,BC=8cm,點(diǎn)P從點(diǎn)A出發(fā)沿邊AC向點(diǎn)C以1cm/s的速度移動(dòng),點(diǎn)Q從C點(diǎn)出發(fā)沿CB邊向點(diǎn)B以2cm/s的速度移動(dòng).