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平面の決定

Author:渡辺たけし

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sine-wave
正１７角形　作図　regular 17-gon 2
standingwave-reflection
二次曲線と離心率
接点の作る円は内接円

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F3 平行線と比の定理
双対点と双対直線
三角関数のグラフ
展開公式図解
斜柱の共通部分2

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Rhombus
Ratios
Cosine
Circumcircle or Circumscribed Circle
Area

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