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钟表制作成功啦
Author:
辛贺华
GeoGebra
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畫出對稱圖形
三半圓間的相切圓(Codex╱2026.10.07)
近似值：有效數字
中華民國國旗 (Codex╱2026.10.06)
美國國旗 (Claude 版)
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折扣 例3
長方體旋轉
angle in semi-circle
固定周界的長方形的面積變化（周界是200厘米）
operations of matrix 2rd ver
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Triangles
Subtraction
Surface
Quadratic Functions
Geometric Distribution