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Author:
keith leung
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Tim Brzezinski
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GeoGebra
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畫出對稱圖形
兩位數加法
拼砌四邊形
兩組對邊相等和有直角的四邊形
四邉形 (四年級) 教師版
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Translation 平移變換
題 7
Sequence指令練習(包絡線:拋物線)
三角形的高
玖数小学数学
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Congruence
Arithmetic Mean
General Quadrilateral
Constructions
Quadratic Functions