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Author:
Ng Ching Yi
GeoGebra
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判斷球體
兩位數除以一位數（二）
畫出對稱圖形
四邊形的特性
【案例】2018年全国1卷理科12题
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可互相控制的動點與滑桿
中垂線
平面幾何的思考
勾股定理（几何原本）的副本
Quiz on Solving One-step Linear Equations (1)
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Unit Circle
Cosine
Differential Equation
Probability
Arithmetic