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Author:
劉家宏
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GeoGebra
New Resources
球体的体积推导
錐體建築師
球體建築師
三位數除以一位數（二）
兩位數加法
Discover Resources
Demonstration of the angles at the same segment
直线与椭圆
illusion 鏡射
Shen Kuo Frustum
中間人
Discover Topics
Inequalities
Exponential Functions
Distributions
Orthocenter
Reflection