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Pi Calculation
Author:
Ted Yao
GeoGebra
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第八周作业
空间中两直线的位置关系
垂直線的斜率
漂亮的摇摆曲线
三位數除以一位數（二）
Discover Resources
平行四邊形面積
Graphs of Linear Equations in Two Unknowns 二元一次方程的圖像
不是平行四邊形的四邊形
Copy of 固定周界的長方形的面積變化
slope
Discover Topics
General Quadrilateral
Equations
Percentages
Correlation
Standard Deviation