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tangent of a 3D surface
Author:
tttamaki
GeoGebra
New Resources
standingwave-reflection-free
直線の軌跡
フーリエ級数展開
対数螺旋
standingwave-plus
Discover Resources
等積変形と四角形
螺旋上の点
ミケルの定理（偶数の場合）
pool
箱3
Discover Topics
Addition
Similar Triangles
Statistics
Plane Figures or Shapes
Ellipse