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円外の点からの接線の作図問題
Author:
Tsuyoshi Yamamoto
GeoGebra
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直線の軌跡
斜めドップラー
standingwave-plus
sine-wave
目で見る立方体の2等分
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ピタゴラスの定理の拡張 Pythagorean extension theorem
対垂三角形
三角関数のグラフ
内角と外角の関係
空間座標3点
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Numbers
Triangles
Equations
Conic Sections
Sphere