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對摺平行四邊形
Author:
hingchan
GeoGebra
New Resources
sanjiaohanshu
判斷球體
算柱 (兩位數)
【案例】2013年安徽高考15题
兩組對邊相等和有直角的四邊形
Discover Resources
模擬隨機變數的「總和」
雙曲線20160521
角的認識
正四角錐(旋轉，實體、透視)
線性變換矩陣（二階）的副本
Discover Topics
Line Segment
Algebra
Integers
Ellipse
Rational Numbers