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三角函数的概念（坐标）
Author:
Sunshine2018
GeoGebra
New Resources
柱體建築師
兩組對邊相等的四邊形
四邊形的特性
判斷球體
拼砌四邊形
Discover Resources
waaachen
弹簧
Locus: Equidistance From Two Points
Copy of 分數比較
任務4的副本
Discover Topics
Arithmetic
Geometric Mean
Bar Chart or Bar Graph
Confidence Interval
Poisson Distribution