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立体に潜む平面②

Author:斎藤　幸弘

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平均変化率
フーリエ級数展開
standingwave-plus
正１７角形　作図　regular 17-gon
６章⑥三角柱の展開図

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白銀比の長方形の特徴を探ろう
３円交線その７
垂心の存在の証明
円Ｐの接線の直極点の軌跡
GHS1231

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Combinatorics
Sine
Planes
Perimeter
Means

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