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Pappus Chain
Author:
李俊儀
GeoGebra
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球体的体积推导（优化版）
判斷球體
画直线等分三角形的面积
畫出對稱圖形
兩組對邊相等的四邊形
Discover Resources
橢圓的軌跡
Equation of Locus of a Point Equidistant from Two Points 軌跡方程：與兩點保持等距
觀察對數的對稱性
Clown
畫三角形 第2題
Discover Topics
Trigonometry
Dilation
Intersection
Rhombus
Pyramid