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面積和周界
Author:
Maggie kan
GeoGebra
New Resources
斐波那契螺旋弧线（表格法-可动态调节）
异形操场
科氏力 (Coriolis Force)
平行線的判定
双心四边形
Discover Resources
gdss
百分數、分數和小數互化
硬幣換算小遊戲
新手任务绘本
Find your perfect rectangle
Discover Topics
Means
Circumcircle or Circumscribed Circle
Multiplication
Sequences and Series
Matrices