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二次函数y=ax²（a<0）
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月如
GeoGebra
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三半圓間的相切圓(Codex╱2026.10.07)
Claude 解幾何題
美國國旗 (Codex 版)
Nested spiral octagon
四邊形的特性
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弧度
DSE Circle-ACT01A Relationship between Chords and Centre of a Circle
求兩斜線區域的差
Congruent Triangle (ASA)
分数减法 Fraction Subtraction
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Centroid or Barycenter
Plane Figures or Shapes
Ellipse
Linear Regression
LCM and GCD