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GeoGebra
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Author:
wangjiezailai
GeoGebra
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盈利與虧蝕
斐波那契螺旋弧线（表格法-可动态调节）
三角函数 的副本
比較五件物件的重量
中华人民共和国国旗
Discover Resources
angle
正方形內部
馬字歌
螢橋國中 陳柏丞
Cross Product for 2D Vectors (平面外積)
Discover Topics
Special Points
Plane Figures or Shapes
Distributions
Vectors 2D (Two-Dimensional)
Arithmetic