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鳩の巣原理_正方形（分割あり）
Author:
伊藤克典
GeoGebra
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接点の作る円は内接円
コイン投げと樹形図
６章⑥三角柱の展開図
standingwave-reflection
対数螺旋
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クリア_Clear49
円錐曲線の性質と活用
区分求積法
三角比の拡張
中1 75°の作図
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Geometric Transformations
Arithmetic Mean
Linear Programming or Linear Optimization
Trigonometric Functions
Rational Numbers