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直角三角形の三角比
Author:
菊池 章仁
GeoGebra
New Resources
正１７角形 作図 regular 17-gon
standingwave-reflection
コイン投げと樹形図
standingwave-reflection-fixed
小テスト
Discover Resources
Archimedes' spiral
内接円証明
hennsu
相似確認（三角形）
箱2
Discover Topics
Sphere
Similar Triangles
Tangent Function
Arithmetic Operations
Parametric Curves