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Elementary school math
Author:
呂宗錡
Drag E and F to rotate the rectangle RSTU.
GeoGebra
New Resources
多邊形的面積
画直线等分三角形的面积
空间中两直线的位置关系
讀磅
祖冲之的期望：内棋与外棋
Discover Resources
Add and subtract (binary)
正弦函數y=sin(x)的泰勒級數
活工(一)Q2
河內塔 3D (Tower of Hanoi 3D)
斐波那契螺旋弧线（表格法-可动态调节）
Discover Topics
Optimization Problems
Geometric Mean
Piecewise Functions
Random Experiments
Similarity Transformation or Similarity