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相似三角形證明
Author:
蔡孟達
GeoGebra
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異分母分數減法
球体的体积推导（优化版）
第八周作业
兩組對邊相等的四邊形
判斷球體
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向日葵
buji
指数函数
正二十面體內接黃金矩形
Copy of cos(x) 的圖形
Discover Topics
Mode
Expected Value
Solids or 3D Shapes
Equilateral Triangles
Perimeter