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正十二面體
Author:
Lin Ching Chieh
GeoGebra
New Resources
讀磅
三位數除以一位數（二）
平行線的斜率
垂直線的斜率
画直线等分三角形的面积
Discover Resources
行星運動
Geometry : Basic Elements (幾何： 基本元素)
操場
雙曲線1-交點法
可控坐标系
Discover Topics
Vectors 2D (Two-Dimensional)
Trigonometric Functions
Division
Cosine
Tangent Function