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三角四星
Author:
吳秉沂
GeoGebra
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sanjiaohanshu
近似值：有效數字
美國國旗 (Codex, 2026.10.06)
算柱 (兩位數)
三半圓間的相切圓(Codex╱2026.10.07)
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黎曼和
sincos
利用頂點描述二次函數 的複本
棱柱
S3 WS4.3 Q02(3D圖)
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Poisson Distribution
Interest Calculation
Diagrams
Set Theory
Optimization Problems