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（使用）中三円周角と中心角p160
Author:
上野隆太郎
GeoGebra
New Resources
正１７角形 作図 regular 17-gon
sine-wave
正１７角形 作図 regular 17-gon 2
standingwave-reflection-free
standingwave-plus
Discover Resources
reverse_02
コスニタ点
touki2
数学ソフトウェア紹介
Yamaguchi's Curve of constant width
Discover Topics
Curve Sketching
Linear Programming or Linear Optimization
Area
Difference and Slope
Symmetry