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二次函数图像交点式
Author:
淑玉
GeoGebra
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美國國旗 (Codex, 2026.10.06)
幾何作圖題：切三圓（題目）
Nested spiral octagon
近似值：有效數字
四邊形的特性
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比和比值
Copy of 閱讀鐘面及數字鐘（時和分）
半圓五角形滑動
Rotational and reflectional symmetry of a regular polygon
黃金矩形
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Hyperbola
Cuboid
Rhombus
Solids or 3D Shapes
Hypergeometric Distribution