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直線系
Author:
RueiYi
GeoGebra
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美國國旗 (Codex, 2026.10.06)
世界平面地圖 (Codex╱2026.10.07)
三半圓間的相切圓(Codex╱2026.10.07)
幾何作圖題：切三圓（題目）
Fibonacci Clock
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Is this a prism 4
點與直線距離、直線與直線距離
希羅公式
空間旋轉矩陣
碎形三角形
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Numbers
Quadratic Equations
Logarithm
Equations
Unit Circle