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三角形と比の証明２
Author:
Tsuyoshi Yamamoto
GeoGebra
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アステロイド
standingwave-plus
正１７角形 作図 regular 17-gon 2
standingwave-reflection-free
standingwave-reflection
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このサイコロはいかさまか？
数学3 2次方程式の活用 田んぼの畔(あぜ)道
等高重心立体
sekibun_bantyou_0
二次関数 場合分け
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Special Points
Derivative
Correlation
Geometry
Geometric Transformations