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凸透镜成像规律演示（多情境）
Author:
向霖 蔡
GeoGebra
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美國國旗 (Codex 版)
Nested spiral octagon
Earth with coastline
中華民國國旗 (Codex╱2026.10.06)
三半圓間的相切圓(Codex╱2026.10.07)
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Geogebra 教學
Multiplication of Polynomials 1(多項式的乘法 1)
(002)80201辛宇婕
橢圓
硬幣換算小遊戲
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Scalene Triangles
Parabola
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