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[学用] 勾股定理的几何原本证明3
Author:
acchu
GeoGebra
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常见四边形是否是双心四边形
斐波那契螺旋弧线（表格法-可动态调节）
第八周作业3
三角函数 的副本
科氏力 (Coriolis Force)
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一般變換
五角星动画
consistent equation 3x3
heart
除法Q6
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Sine
Coordinates
Trigonometry
Triangles
Geometric Transformations