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三角測量01
Author:
luke huang
GeoGebra
New Resources
算柱 (兩位數)
兩位數除以一位數（二）
画直线等分三角形的面积
異分母分數減法
找出對稱軸
Discover Resources
Magnitude of cosine
碎形
五点共圆
三角函數 角度變換(個人認為直覺上較好理解的)(手機使用教材)
Circle
Discover Topics
Step Functions
Parametric Curves
Trigonometry
Intersection
Angles