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P199 問8

Author:下地博之信

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sine-wave
円の伸開線
接点の作る円は内接円
対数螺旋
直線の軌跡

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orthic triangle
ミケルの定理その２
内心（図形の性質）とくに角度〜
倍角と半角
おうぎ形の性質ワークシート

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Normal Distribution
Symmetry
Geometric Mean
Arithmetic
Indefinite Integral

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