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Author:
Chenwei Chen
GeoGebra
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平行線的判定
斐波那契螺旋弧线（表格法-可动态调节）
第八周作业
盈利與虧蝕
第八周作业1
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林書豪加油
测试 = =
量角器
上色練習
S3 Ex4.3 Q06(3D圖)
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Trigonometry
Equilateral Triangles
Inequalities
Reflection
Cuboid