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正２０面体（黄金比）
Author:
Bunryu Kamimura
GeoGebra
New Resources
standingwave-reflection-free
対数螺旋
sine-wave
円の伸開線
コイン投げと樹形図
Discover Resources
平行移動
tanの加法定理その２
放物線と線分の共有点
Copy of 複素数平面上の三角形の形状
y=a(x+1)
Discover Topics
Coordinates
Right Triangles
Unit Circle
Sequences and Series
Solids or 3D Shapes