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Author:
eyun306
GeoGebra
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折扣
比較五件物件的重量
椭圆内切圆链
常见四边形是否是双心四边形
平行線的判定
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平行四邊形的面積教材一
絕對值正弦函數圖形
展開圖
河南2019中考第23题
擲兩個硬幣的機率分布的副本
Discover Topics
Optimization Problems
Rhombus
Circumcircle or Circumscribed Circle
Probability
Congruence