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角の二等分線と比 証明 2
Author:
yonekawasatoshi
GeoGebra
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正１７角形 作図 regular 17-gon 2
standingwave-reflection-free
サイクロイド
フーリエ級数展開
standingwave-plus
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円周率と正多角形
内積の分配法則
円の面積と円周の増え方
等積変形_平行四辺形 のコピー
教科書ｐ94
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Constructions
Cone
Scalene Triangles
Natural Numbers
Similar Triangles