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三角比の中心角と高さ・斜辺
Author:
住田 靖弘
GeoGebra
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目で見る立方体の2等分
等積変形2
standingwave-reflection
正１７角形 作図 regular 17-gon
平均変化率
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外接円→円周角の定理 Theorem of the angle of circumference
逆中点三角形の等角等距離共役点
傾きと点による直線
Copy of 軌跡(中点)
水平投射
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Kite
Median Line
Means
Set Theory
Fractal Geometry