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正多邊形各邊中點連線所圍成的圖形v2
Author:
Jimmy Ma
GeoGebra
New Resources
判斷球體
錐體建築師
三位數除以一位數（二）
四邉形 (四年級) 教師版
【案例】2018年全国1卷理科12题
Discover Resources
最小值
Dizzy (Just for Fun)
劉徽的「割圓術」
弹簧的副本
假定平均數(教師講解用)
Discover Topics
Fractions
Arithmetic
Area
Circumcircle or Circumscribed Circle
Pythagoras or Pythagorean Theorem