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垂心の存在の証明
Author:
Tetsuya Akazawa
GeoGebra
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正１７角形 作図 regular 17-gon
standingwave-reflection
平均変化率
目で見る立方体の2等分
サイクロイド
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∫<0,2π>1/(5+3sin t) dt を複素積分で計算
三角錐の重心 The center of gravity of the triangular pyramid
三次関数でカオス
９点円の拡張の証明
円の交点の性質①
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Volume
Centroid or Barycenter
Real Numbers
Quadratic Equations
Ratios