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台球反射
Author:
朱亮
GeoGebra
New Resources
近似值：有效數字
算柱 (兩位數)
四邊形的特性
兩組對邊相等和有直角的四邊形
兩位數除以一位數（一）
Discover Resources
平面幾何
二次函数
弦心距比較
畢氏定理
周界
Discover Topics
Area
Derivative
Interest Calculation
Circumcircle or Circumscribed Circle
Cube