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1989全国理14
Author:
常振虎
GeoGebra
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兩位數加法
第八周作业
三位數除以一位數（一）
球体的体积推导
兩位數除以一位數（二）
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三角形全等的理由 – 題2
Parallelogram 01
立方體截痕
立方體截痕
選修數學
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Pythagoras or Pythagorean Theorem
Incircle or Inscribed Circle
Linear Regression
Geometric Distribution
Orthocenter