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三角形の内接円及び外接円
Author:
宗田 法之
GeoGebra
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等積変形2
コイン投げと樹形図
standingwave-reflection
standingwave-reflection-free
正１７角形 作図 regular 17-gon 2
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円周角の定理の逆
monkey hunting
tetranball
ベクトルの結合法則
サイクロイド
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Statistical Characteristics
Arithmetic
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Orthocenter