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Author:Jensen Wong

Topic:Orthocenter

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四邊形的特性
柱體建築師
兩組對邊相等的四邊形
兩組對邊相等和有直角的四邊形
【案例】圆柱体内放置一个大球六个小球

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Probability animation
圓錐曲線 vs.雙曲線定義式
P6 圓周01C
椭圆的中点弦的轨迹.许兴华数学
兩組對邊相等和有直角的四邊形

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Quadratic Equations
Rational Numbers
Similarity Transformation or Similarity
Tangent Function
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