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角の二等分線と比 証明 2
Author:
yonekawasatoshi
GeoGebra
New Resources
等積変形2
正１７角形 作図 regular 17-gon 2
standingwave-reflection
目で見る立方体の2等分
対数螺旋
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すうがくB
立体 線分を動かして（②円）
接線と弦のつくる角
固有ベクトルで座標変換
ベジエ曲線
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Statistics
Symmetry
Planes
Sequences and Series
Exponent