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齊找對稱軸
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相同圖形的拼砌（三角形）
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相同圖形的拼砌（三角形）
Activity
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切割任意四邊形再拼砌成矩形
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相同圖形的拼砌（三角形）
Activity
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相同圖形的拼砌（梯形）
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相同圖形的拼砌（有兩組平行線的四邊形）
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TEST
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