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三角形と比の逆の証明
Author:
Tsuyoshi Yamamoto
GeoGebra
New Resources
standingwave
sine-wave
二次曲線と離心率
サイクロイド
等積変形2
Discover Resources
The Napoleon's Theorem and Fermat Point
プリズム
ねじれの位置
転がす
感覚と数（正三角形らしく見えますか？）
Discover Topics
Intersection
Triangles
Functions
Random Variables
Cube