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優良作品2
Author:
Ching-Hui Chou
GeoGebra
New Resources
找出對稱軸
算柱 (兩位數)
近似值：有效數字
長方體平面投影 (Codex版)
幾何作圖題：切三圓（題目）
Discover Resources
祖恒原理
相同圖形的拼砌（三角形）
Pythagorean Theorem Proof with Shearing
旋轉圓弧
莫比乌斯带
Discover Topics
Congruence
Dilation
Centroid or Barycenter
Quadratic Functions
Exponential Functions