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２つの正三角形の問題
Author:
Tsuyoshi Yamamoto
GeoGebra
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sine-wave
正１７角形 作図 regular 17-gon
standingwave-reflection-fixed
円の伸開線
小テスト
Discover Resources
対頂角・同位角・錯角
日食と月食
Copy of 円周角の定理
正八面体の展開図
薬の服用と漸化式
Discover Topics
Similar Triangles
Square
Vectors 3D (Three-Dimensional)
Inequalities
Reflection