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二次函数y=ax²（a＞0)
Author:
吕胜
GeoGebra
New Resources
找出對稱軸
異分母分數減法
球体的体积推导（优化版）
畫出對稱圖形
四邊形的特性
Discover Resources
three circle touching each other
圓與直線距離
填色問題(封閉圖形)
二面角
sin(x) 的函數圖形 官長壽老師
Discover Topics
Arithmetic Mean
Mathematics
Random Variables
Interest Calculation
Quadrilaterals