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方正外表下的爱心
Author:
林峰
GeoGebra
New Resources
斐波那契螺旋弧线（表格法-可动态调节）
折扣
平行線的判定
撒针估算面积实验
活动三：应用性质
Discover Resources
會動的函數圖形
Translation, Reflection and Rotation
Copy of 固定周界的長方形的面積變化
test
学用数学
Discover Topics
Line Segment
Vectors
Piecewise Functions
Orthocenter
Cube