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sin cos tan
Author:
Wong hok
GeoGebra
New Resources
三位數除以一位數（二）
兩組對邊相等的四邊形
判斷球體
四邊形的特性
找出對稱軸
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餘弦函數值的變化
wind
外心
底数，指数，幂的函数关系
斐波那契螺旋弧线（表格法-可动态调节）
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Tangent Line or Tangent
Geometric Distribution
Isosceles Triangles
Subtraction
Optimization Problems