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tan

Author:石川英樹

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目で見る立方体の2等分
接点の作る円は内接円
正１７角形　作図　regular 17-gon 2
standingwave
sine-wave

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円周角の定理
Quadric
内心→垂心→外心
小数のかけわり図
傍接楕円

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Plane Figures or Shapes
Linear Equations
Quadratic Equations
Difference and Slope
Statistical Characteristics

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