Question

如圖所示，請(qǐng)?jiān)诰W(wǎng)格中作出△ABC關(guān)于點(diǎn)O對(duì)稱的△A₁B₁C₁，再作出△A₁B₁C₁繞點(diǎn)B₁逆時(shí)針旋轉(zhuǎn)90°后的△A₂B₁C₂．

Answer 1

考點(diǎn)：作圖-旋轉(zhuǎn)變換

專題：

分析：利用關(guān)于點(diǎn)O對(duì)稱點(diǎn)的性質(zhì)得出對(duì)應(yīng)點(diǎn)坐標(biāo)進(jìn)而得出答案，再利用旋轉(zhuǎn)的性質(zhì)得出對(duì)應(yīng)點(diǎn)得出圖形即可．

解答：解：如圖所示：△A₁B₁C₁和△A₂B₁C₂，即為所求．

點(diǎn)評(píng)：此題主要考查了旋轉(zhuǎn)變換，根據(jù)題意得出對(duì)應(yīng)點(diǎn)位置是解題關(guān)鍵．