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正七邊形2
Author:
李春培
正七邊形2
GeoGebra
New Resources
兩組對邊相等的四邊形
兩組對邊相等和有直角的四邊形
画直线等分三角形的面积
三位數除以一位數（二）
兩位數加法
Discover Resources
World's Second-Hardest Easy Geometry Problem
Proof35 高士哲
西姆松定理推廣(西姆松圓)
ghseh 二次函數描點法左右平移-3
探索二次函数的性质
Discover Topics
Stochastic Process or Random Process
Sine
Angles
Ratios
Quadratic Equations