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Author:
Gideon Huang
GeoGebra
New Resources
算柱 (兩位數)
四邉形 (四年級) 教師版
近似值：有效數字
Fibonacci Clock
長方體平面投影 (Codex版)
Discover Resources
畫三角形 題3a
畢氏定理動態證明(歐基里得，應用時間參數跳躍函數)
Quiz on Special Lines in Triangles 三角形內的特殊線：測驗
Hyperbolic Paraboloid 的製作
題一
Discover Topics
Quadrilaterals
Symmetry
Sphere
Coordinates
Real Numbers