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pyramid
Author:
Wong Ka Leong
GeoGebra
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斐波那契螺旋弧线（表格法-可动态调节）
三角函数 的副本
活动三：应用性质
盈利與虧蝕
异形操场
Discover Resources
簡易統計
triangle
重複
乘法的副本
黎曼和的副本
Discover Topics
Coordinates
Circle
Algebra
Planes
Piecewise Functions