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陳允杰 橢圓反射
Author:
陳允杰
GeoGebra
New Resources
三位數除以一位數（二）
近似值：有效數字
拼砌四邊形
找出對稱軸
兩位數加法
Discover Resources
Sequence指令練習(逐一套疊正方形)
轉盤1
Angle of elevation and Angle of depression(仰角和俯角)
两个经典不等式
植树问题
Discover Topics
Poisson Distribution
Vectors 2D (Two-Dimensional)
Rotation
Polynomial Functions
Fractal Geometry