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Author:: Tetsuya Akazawa

GeoGebra Applet

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正12面体の投影図
GHS1235
GHS1227
パスカルの定理とブリアンション点
外接四角形と内接四角形

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フレネ・セレ標構
パップスの問題（双曲線）
P.260応用例題4
チェバの定理（Ceva's theorem）
方べきの定理 3

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Arithmetic Mean
Symmetry
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Sequences and Series
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