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難問1(平行四辺形)
Author:
Bunryu Kamimura
Topic:
Parallelogram
どこにどんな補助線を引くか。
GeoGebra
New Resources
カージオイド
standingwave-plus
接点の作る円は内接円
standingwave-reflection-fixed
直線の軌跡
Discover Resources
三角形の合同
f1(x)=4x(1-x),fn+1(x)=fn(f(x))
幾何学的双対性
リサージュ曲線
垂心と外心の対称性
Discover Topics
Kite
Reflection
Combinatorics
Pythagoras or Pythagorean Theorem
Cylinder