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Author:
Tse Sir
例子
GeoGebra
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直角坐標平面上的旋轉變換
Fibonacci Clock
Nested spiral octagon
三半圓間的相切圓(Codex╱2026.10.07)
sanjiaohanshu
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龍騰4_1-1課例5
Classifying Quadrilaterals
翹翹板
答重庆杨志友椭圆的定义
序列（圆内弦）
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Derivative
Ellipse
Inequalities
Congruence
Cuboid