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三角形外心的角度關係
Author:
均一
GeoGebra
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畫出對稱圖形
算柱 (兩位數)
判斷球體
找出對稱軸
球体的体积推导（优化版）
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梯形有甚麼特性？
畢氏定理
圖形拼砌與分割
二次函数y=ax²（a＞0)
S3 WS4.3 Q02(3D圖)
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Terms
Solids or 3D Shapes
Function Graph
Ratios
Triangles