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F2 正三角形の合同 証明問題
Author:
Hisao Yamamoto
GeoGebra
New Resources
対数螺旋
正１７角形 作図 regular 17-gon 2
円の伸開線
standingwave-reflection
接点の作る円は内接円
Discover Resources
Ex_108
derivative and integrals of a linear function
排反事象
chime
二次曲線と離心率
Discover Topics
Geometric Transformations
Trigonometry
Pie Chart or Circle Chart
Circumcircle or Circumscribed Circle
Conic Sections