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rectangle
Author:
Louis Wong
GeoGebra
New Resources
双心四边形
第三周作业效果演示
第八周作业
活动三：应用性质
斐波那契螺旋弧线（表格法）
Discover Resources
hw02
三角形
Ex5C#12
Sierpinski Triangle
抛物面
Discover Topics
Trigonometric Functions
Statistical Characteristics
Diagrams
Matrices
Upper and Lower Sum or Riemann Sum