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平行四邊形_小
Author:
keihin
GeoGebra
New Resources
双心四边形
祖冲之的期望：内棋与外棋
多邊形的面積
漂亮的摇摆曲线
三角函数 的副本
Discover Resources
直向橢圓
Copy of 固定周界的長方形的面積變化
螢橋國中 鄭毅華
Simultaneous Equations (Linear and quadratic)
圓錐截痕
Discover Topics
Natural Numbers
Circle
Bar Chart or Bar Graph
Distributions
Set Theory