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proof51 柯承志
Author:
郭亮偉
GeoGebra
New Resources
拼砌四邊形
三位數除以一位數（一）
【案例】2013年安徽高考15题
判斷球體
找出對稱軸
Discover Resources
河內塔 (Tower of Hanoi)
形心
平面
餘弦公式2
circle: line from centre
Discover Topics
Pythagoras or Pythagorean Theorem
Continuity
Normal Distribution
Random Variables
Stochastic Process or Random Process