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正三角形堆垛
Author:
施奕瑄
GeoGebra
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GeoGebra笔记功能体验课件
兩組對邊相等的四邊形
三位數除以一位數（二）
判斷球體
球体的体积推导（优化版）
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Ratio of angles at the centre and the length of the arcs.
圓周
相似三角形的邊長成比例
三角形的三个旁切圆.许兴华数学
f(x)=sinx的圖形--伸縮與平移
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Function Graph
Boxplot
Logarithmic Functions
Indefinite Integral
Set Theory