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泡泡碰碰球
Author:
chenyunfei
GeoGebra
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四邊形的特性
兩組對邊相等的四邊形
兩位數除以一位數（二）
画直线等分三角形的面积
第八周作业
Discover Resources
Apollonius Problem 6 CLP Inversion 34
平行線 (同位角 - 4對)
放射狀旋轉圖形(2)
错觉多边形
折扣 例6的副本
Discover Topics
Curve Sketching
Addition
Indefinite Integral
Kite
Congruence