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円周角の定理
Author:
嶋津恒彦
GeoGebra
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正１７角形 作図 regular 17-gon 2
正１７角形 作図 regular 17-gon
等積変形2
目で見る立方体の2等分
接点の作る円は内接円
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和事象と積事象
デザルグの定理の証明
理解塾
p71 4番
三角関数(単位円)度数法
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Line Segment
Polygons
Terms
Intersection
Rational Numbers