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余弦定理 The Law of Cosines
Author:
HIRAIWA Koichi
GeoGebra
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円の伸開線
standingwave
対数螺旋
二次曲線と離心率
正１７角形 作図 regular 17-gon
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Frenet-serret frame
mixtilinear04
正規分布の標準偏差
幾何１完成ノート139
四角形の直極点
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Tangent Line or Tangent
Line Segment
Angles
Linear Functions
Plane Figures or Shapes