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杯子反射光線(包絡)
Author:
陳柄何
Topic:
Curve Sketching
GeoGebra
New Resources
第八周作业2
正方形雪花图案
折扣
活动三：应用性质
盈利與虧蝕
Discover Resources
七巧板（tangram）
平行綫的斜率
伸縮矩陣
涌动
正八角錐(旋轉，實體、透視)
Discover Topics
Tangent Function
General Quadrilateral
Matrices
Complex Numbers
Centroid or Barycenter