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２つの正三角形の問題
Author:
Tsuyoshi Yamamoto
GeoGebra
New Resources
直線の軌跡
正１７角形 作図 regular 17-gon
sine-wave
standingwave-reflection
standingwave-reflection-fixed
Discover Resources
円錐の側面の中心角と底面の半径（平成27年度全国学力・学習状況調査数学B問題６)
magic cube 5×5
回転体4step465-y
線のステレオグラム
調和平均8-3
Discover Topics
Symmetry
Normal Distribution
Tree Diagrams
Algebra
Combinatorics