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变化的平行四边形
Author:
孙逸旻
Topic:
Parallelogram
GeoGebra
New Resources
四邊形的特性
異分母分數減法
近似值：有效數字
兩位數加法
判斷球體
Discover Resources
八芒星
數學繪圖
工具：DimensionArrows
同角三角函数的基本关系（正六边形记忆法）
等距曲线ggb作图法
Discover Topics
Sphere
Sine
Median Line
Quadratic Equations
Incircle or Inscribed Circle