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三角形
Author:
蘇梓棱
Topic:
Triangles
GeoGebra
New Resources
球體建築師
找出對稱軸
判斷球體
柱體建築師
球体的体积推导（优化版）
Discover Resources
圓與切線
帕普斯定理：齊次座標
Angle of elevation and Angle of depression(仰角和俯角)
抛物线第一定义
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Discover Topics
Vectors 3D (Three-Dimensional)
Isosceles Triangles
Subtraction
Percentages
Variance