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２つの正三角形の問題
Author:
Tsuyoshi Yamamoto
GeoGebra
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サイクロイド
６章⑥三角柱の展開図
接点の作る円は内接円
正１７角形 作図 regular 17-gon
sine-wave
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領域
Yamaguchi's Surface of constant width
一点から二定円への接する円
８つの接円
展開図が正方形の三角錐
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Trapezoid
Geometric Transformations
Cylinder
Mode
Fractions