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質問2
Author:
嶋津恒彦
GeoGebra
New Resources
standingwave-reflection
正１７角形 作図 regular 17-gon 2
接点の作る円は内接円
二次曲線と離心率
対数螺旋
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Export image formats
根から係数（方程式）へ
５角形の外角の和
区分求積
Copy of SHM in a Pendulum
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Perimeter
Parallelogram
Area
Ellipse
Subtraction