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畢氏定理動畫
Author:
施重宇
GeoGebra
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多邊形的面積
讀磅
球体的体积推导
画直线等分三角形的面积
漂亮的摇摆曲线
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Easter egg
Quiz on Special Lines in Triangles 三角形內的特殊線：測驗
gjh-g04-01 差的平方公式
菱形有甚麼特性？
C60足球模型（金丝彩球）
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Numbers
Inequalities
General Quadrilateral
Mode
Scalene Triangles