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F3 平行線と比の定理
Author:
Hisao Yamamoto
GeoGebra
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対数螺旋
正17角形 作図 regular 17-gon 2
standingwave-plus
standingwave-reflection
サイクロイド
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検出力と棄却域
正二十面体
円周角の定理の逆
分数のわり算
三角形(六角形)
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Triangles
Intersection
Orthocenter
Parabola
Rectangle