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平行四邊形
Author:
eyun306
Topic:
Parallelogram
GeoGebra
New Resources
找出對稱軸
兩位數加法
柱體建築師
兩位數除以一位數（二）
【案例】圆柱体内放置一个大球六个小球
Discover Resources
[工具箱] 標示長度
平行四边形面积演示
數學電腦繪圖&解題
探索三角函数的图像
椭圆的定义
Discover Topics
Vectors
Equilateral Triangles
Linear Functions
Rotation
Triangles