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椭圆内切圆链
Author:
孟宝兴
GeoGebra
New Resources
兩位數加法
兩位數除以一位數（一）
四邉形 (四年級) 教師版
算柱 (兩位數)
找出對稱軸
Discover Resources
橢圓軌跡 (2)
中點軌跡(動點在兩圓上)
橢圓螺旋
林辰洋 ggb作業2
bay1-2&1-3
Discover Topics
Arithmetic Mean
Difference and Slope
Addition
Step Functions
Exponential Functions