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五角形の内角の和
Author:
伊藤秀雄
GeoGebra
New Resources
正１７角形 作図 regular 17-gon
接点の作る円は内接円
standingwave-reflection-free
等積変形2
standingwave
Discover Resources
additional theorem
第12回演習問題3
面積4step440-1-2-3-4-5-6
円周角の定理2
一直線上にある点
Discover Topics
Statistics
Multiplication
Subtraction
Cone
Logarithmic Functions