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軸對稱指的是兩個圖形的關係:如果一個圖形沿對稱軸翻折可以和另一個重合,那麼這兩個圖軸對稱. 軸對稱圖形指的是一個圖形.如果存在一條對稱軸使得該圖形沿軸對折可以重合,那麼這個圖形就是軸對稱圖形. 舉例:圓是軸對稱圖形(直徑是對稱軸) 兩個等圓成軸對稱(必然存在一條對稱軸)
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