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Introduce tangent ratio
Author:
VCChung
GeoGebra
New Resources
画直线等分三角形的面积
拼砌四邊形
GeoGebra笔记功能体验课件
畫出對稱圖形
球体的体积推导（优化版）
Discover Resources
自製座標軸箭頭與標籤
Quiz on Rotation 旋轉變換：測驗
國旗
物理
畫三角形 題1b 的複本
Discover Topics
Logarithm
Normal Distribution
Linear Functions
Scatter Plot
Sequences and Series