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S8G5 消失的小方格
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学用数学
GeoGebra
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百分數及其應用
正方形雪花图案
比較五件物件的重量
龙形曲线-分形龙
折扣
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一元二次方程式-應用問題(兩圓相切-2)
平面幾何的思考
Locus (Segment)
正n邊形內接縮小正n邊形
黃金矩形
Discover Topics
Probability
Upper and Lower Sum or Riemann Sum
Equilateral Triangles
Quadratic Functions
Orthocenter