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正弦定理2
Author:
杨欣霞
GeoGebra
New Resources
讀磅
圓的切線方程
垂直線的斜率
常见四边形是否是双心四边形
圓周公式的應用
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折扣 例4
cherry family
竞猜游戏：说出图中角的大小
正n邊形內角與外角 的複本
三角函數 週期、振幅變化 課堂投影用
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Geometric Transformations
Dilation
Angles
Reflection
Optimization Problems