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Author:
Lin Ching Chieh
GeoGebra
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斜率的值
漂亮的摇摆曲线
圓周公式的應用
平行線的斜率
空间中两直线的位置关系
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軸對稱
弦的定理
Addition and Subtraction of Directed Numbers (1) 有向數加減(1)
弦心距垂直平分弦
hint
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Right Triangles
Similar Triangles
Area
Equilateral Triangles
Solids or 3D Shapes