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30°の角の作図
Author:
Ryoichi Nakayama
GeoGebra
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正17角形 作図 regular 17-gon 2
円の伸開線
コイン投げと樹形図
standingwave
接点の作る円は内接円
Discover Resources
三角形の内角
体5_186_rd1
対頂角
作図(練習32)
帰納的定義と演繹的定義
Discover Topics
Rhombus
Vectors 2D (Two-Dimensional)
Numbers
Distributions
Trigonometry