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三角形
Author:
chijiwa
Topic:
Triangles
GeoGebra
New Resources
対数螺旋
接点の作る円は内接円
standingwave-reflection
sine-wave
正１７角形 作図 regular 17-gon 2
Discover Resources
９点円の拡張の証明
放物線（x軸が軸となる場合）
問題1-3
数学1 図形の移動
平行線と角
Discover Topics
Differential Equation
Pythagoras or Pythagorean Theorem
Matrices
Tangent Line or Tangent
Angles