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projection of x onto a1,a2,a3 in 3D
Author:
tttamaki
GeoGebra
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正１７角形 作図 regular 17-gon
小テスト
standingwave-plus
６章⑥三角柱の展開図
接点の作る円は内接円
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双曲線水槽の反射
三角形の作図（3辺）
三角形の等積変形
軌跡 / 逆手流
空間ベクトルNo.1例２
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Definite Integral
Real Numbers
Orthocenter
Arithmetic Mean
Addition