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橢圓與雙曲線折紙
Author:
Hsin Han Wang
移動C點就可以看到橢圓跟雙曲線的包絡線
GeoGebra
New Resources
直線的斜率：水平變化 & 鉛垂變化
平行線的斜率
祖冲之的期望：内棋与外棋
漂亮的摇摆曲线
直線的斜率
Discover Resources
上和與下和
How to draw a triangle with ruler and compasses?
販賣部草圖
乘數表
C60足球模型（多边形）
Discover Topics
Unit Circle
Frequency Distribution
LCM and GCD
Addition
Scatter Plot