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圓外切四邊形（展示可推廣到凹多邊形）
Author:
Gideon Huang
Topic:
Geometry
GeoGebra
New Resources
畫出對稱圖形
AI 訓練教室
美國國旗 (Codex 版)
Nested spiral octagon
球體建築師
Discover Resources
方格纸上画平行线和垂线
Rotational symmetry examples
水车应用题动画演示
正十二面體內接正四面體旋轉
旁心
Discover Topics
Quadratic Equations
Derivative
Kite
Arithmetic
Complex Numbers