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三角函數
Author:
mindson1129
GeoGebra
New Resources
三角函数 的副本
平行線的判定
第八周作业
撒针估算面积实验
活动三：应用性质
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這是什麼角？
題2
Drag Q. Locus of P?
阿基米德的異想世界
圆的有关概念
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LCM and GCD
Polygons
Differential Calculus
Translation
Trapezoid