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Question 9
Author:
Shum Kwok Ching
,
GeoGebra Institute of Hong Kong
GeoGebra
New Resources
畫出對稱圖形
画直线等分三角形的面积
異分母分數減法
柱體建築師
球体的体积推导（优化版）
Discover Resources
量度活動所用的時間 (時、分、秒)
正方形和長方形有甚麼特性？
Solid geometry
以 Unit Circle 了解 Sine 的正/負的副本
直角坐標與極坐標的轉換
Discover Topics
Arithmetic Mean
Square
Fractions
Unit Circle
Division