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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
【案例】2018年全国1卷理科12题
異分母分數減法
兩位數加法
兩組對邊相等的四邊形
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斜率
柏拉圖立體的"循環節"草2
正方体展开图的副本
鉛筆畫圓
模拟时钟
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Equilateral Triangles
LCM and GCD
Curve Sketching
Variance
Ratios