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Author:
Yan Dongtai（严东泰）
GeoGebra
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第八周作业1
第八周作业3
斐波那契螺旋弧线（表格法-可动态调节）
撒针估算面积实验
盈利與虧蝕
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擺線
中點_圓_多邊形_軌跡
(3D) Tasks: Pyramid, Paper folding & Solid of revolution[20170615]
金惠吉：正弦交流电演示
翰林數學_1下_CH2-1_直角坐標平面的認識
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Scalene Triangles
Sphere
Trigonometry
Statistical Characteristics
Linear Programming or Linear Optimization