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外面有圓
Author:
施重宇
GeoGebra
New Resources
Nested spiral octagon
Fibonacci Clock
國旗 (作圖步驟直接餵給 Claude)
算柱 (兩位數)
三半圓間的相切圓(Codex╱2026.10.07)
Discover Resources
我的作法
三平行線上作正三角形
偏心的農夫?
周界
Copy of 分數比較
Discover Topics
Circle
Perimeter
Straight Lines
Vectors
Reflection