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正七邊形
Author:
李春培
正七邊形
GeoGebra
New Resources
兩組對邊相等和有直角的四邊形
四邉形 (四年級) 教師版
球体的体积推导（优化版）
判斷球體
球體建築師
Discover Resources
遞迴數列的星星
Area of square
Light reflected in hyperbola的副本
分页显示及分步显示
椭圆的一种简单画法.许兴华数学
Discover Topics
Scalene Triangles
Constructions
Exponent
Quadratic Equations
Statistical Characteristics