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五上-CP4-第三节平行四边形面积1
Author:
冉献伟
GeoGebra
New Resources
找出對稱軸
兩位數加法
第八周作业
sanjiaohanshu
兩位數除以一位數（二）
Discover Resources
小二三 畫時鐘
橢圓之極偶 / polarity for ellipse
雙曲線與共軛雙曲線
直線上的鄰角_1
四邊形外接正方形
Discover Topics
Perimeter
Parametric Curves
Linear Functions
Conditional Probability
Step Functions