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Author:
Ricky Chan
GeoGebra
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美國國旗 (Codex 版)
幾何作圖題:切三圓(題目)
三半圓間的相切圓(Codex╱2026.10.07)
Nested spiral octagon
世界平面地圖 (Codex╱2026.10.07)
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三角形面積、底、高的關係
四邊形內部反射_長寬角度可調整
五圓相切
填色問題(封閉圖形)
沪教版练习册7.4第4题
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Numbers
Real Numbers
Constructions
Trapezoid
Cone