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TriangleCenter()
Author:
Tatsuyoshi Hamada
TriangleCenter( <Point>, <Point>, <Point>, <Number> )
Incenter
Centroid
Circumcenter
Orthocenter
...
GeoGebra
http://www.jasoncantarella.com/wordpress/software/perl-triangle-centers/
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目で見る立方体の2等分
円の伸開線
二次曲線と離心率
standingwave-plus
接点の作る円は内接円
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中線定理のベクトルによる証明
鳥と虫 12コマ
垂心を通る直線の直極点の軌跡
等角らせんの曲率
二次関数を描く
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Hypothesis Testing
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Combinatorics
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Division