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Author:
Lee Chun Ming
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平行線的斜率
兩位數除以一位數(一)
祖冲之的期望:内棋与外棋
探究三角形的全等條件
垂直線的斜率
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光源距離 Light Source Distance
定理7.1&7.2
沈暐珊 橢圓反射
勝者即正義
三角形的垂心(一)
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Sequences and Series
Random Variables
Conditional Probability
Pythagoras or Pythagorean Theorem
Geometric Transformations