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二つの正三角形

Author:Naofumi Horio

New Resources

円の伸開線
standingwave
standingwave-reflection
サイクロイド
直線の軌跡

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Circle
三角形の包絡線
p218
Snapping
おりかえしておえかき

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Constructions
Multiplication
Equations
Geometric Transformations
Curve Sketching

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