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正四面体の内接球の半径のコピー

Author:kato44tk, 嶋津恒彦

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standingwave-reflection
等積変形2
正１７角形　作図　regular 17-gon 2
正１７角形　作図　regular 17-gon
二次曲線と離心率

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オイラー線の内分
穴開け
正12面体基本
STEP B 65
対象座標法の理解

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Random Variables
Geometric Transformations
Quadratic Equations
Right Triangles
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