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S408 Penrose 階梯
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学用数学
GeoGebra
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直線的斜率：水平變化 & 鉛垂變化
比較五件物件的重量
圓的切線方程
折扣
平行線的判定
Discover Resources
電子幾何條
正三角形
Geometry : Types of Angles (幾何：角的種類)
函数积分
congruent triangle2_provided by Mr Yeung Kar Chun
Discover Topics
Multiplication
Right Triangles
Differential Equation
Translation
Combinatorics