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同角三角函数的基本关系（正六边形记忆法）
Author:
桃篮翁
GeoGebra
New Resources
兩組對邊相等和有直角的四邊形
GeoGebra笔记功能体验课件
【案例】圆柱体内放置一个大球六个小球
四邊形的特性
四邉形 (四年級) 教師版
Discover Resources
color
Exploring the changes in mean and median
Example 2
uguguhu
相反数 探究 （教材第9页）
Discover Topics
Linear Programming or Linear Optimization
Polygons
Sequences and Series
Median Line
Exponent