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外凸的正方形
Author:
陈宜红
Topic:
Plane Figures or Shapes
GeoGebra
New Resources
斐波那契螺旋弧线（表格法）
第三周作业效果演示
常见四边形是否是双心四边形
异形操场
斐波那契螺旋弧线（表格法-可动态调节）
Discover Resources
special
三角柱算體積(可以切開)
先估算，後看解釋
F2_Ch11.2_三角學(邊長與角的關係)
美麗的花
Discover Topics
Similar Triangles
Linear Programming or Linear Optimization
Cube
Arithmetic Operations
Inequalities