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正方体镂空模型（通用）
Author:
孟宝兴
GeoGebra
New Resources
畫出對稱圖形
三位數除以一位數（二）
兩組對邊相等和有直角的四邊形
找出對稱軸
拼砌四邊形
Discover Resources
軸對稱
Apollonius Problem 7 CCP Inversion 12
心電感應
圓內接四邊形對角
摺長方形
Discover Topics
Secant Line or Secant
Tree Diagrams
Line Segment
Congruence
Standard Deviation