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円錐の切断(軸をふくむ平面)
Author:
Tsuyoshi Yamamoto
GeoGebra
New Resources
正１７角形 作図 regular 17-gon 2
standingwave-reflection-fixed
アステロイド
standingwave-plus
二次曲線と離心率
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What is blue curve? No.1
節線 腹線 3D
九九に５０はある？
Copy of 対偶
極線でパスカル線を作図
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Perimeter
Equations
Tree Diagrams
Sine
Quadratic Functions