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神之作
Author:
彭柏淵
GeoGebra
New Resources
畫出對稱圖形
球體建築師
【案例】圆柱体内放置一个大球六个小球
錐體建築師
三位數除以一位數（一）
Discover Resources
DSE
畢氏定理證明
test
和差角公式几何证明
ie 9
Discover Topics
Reflection
Angles
Correlation
Limits
Special Points