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三角函数的概念（坐标）
Author:
Sunshine2018
GeoGebra
New Resources
找出對稱軸
兩組對邊相等的四邊形
兩位數加法
判斷球體
兩位數除以一位數（二）
Discover Resources
徐州市初二年级期末试题
我的测试
圓圈圈
雙曲線的定義
美丽的斯坦纳圆链
Discover Topics
Scalene Triangles
Frequency Distribution
Vectors 3D (Three-Dimensional)
Addition
Rectangle