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三角形の垂心（an orthocenter）

Author:Takayuki Kamei

Topic:Orthocenter

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サイクロイド
二次曲線と離心率
standingwave-plus
standingwave-reflection-free
直線の軌跡

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外角の証明
不定積分四択1.02
平面
sonogebra ①
証明をしてみよう

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Conic Sections
Similarity Transformation or Similarity
Constructions
Arithmetic Mean
Ellipse

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