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p05 eqidistant from two lines
Author:
johnmayhk
GeoGebra
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拼砌四邊形
三位數除以一位數（一）
畫出對稱圖形
GeoGebra笔记功能体验课件
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test
拿破侖定理(外拿破侖)證明二
光的反射
rotational symmetry_1
根據百分率找數量（二）: 例4的副本