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三角函數sine跟cosine
Author:
JUNWAYLIANG
GeoGebra
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畫出對稱圖形
拼砌四邊形
兩位數加法
【案例】2018年全国1卷理科12题
画直线等分三角形的面积
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equilateral triangle construction
角α与-α的正弦函数关系
相向而行的兩行進波
Quiz on Rotation 旋轉變換：測驗
正N边形点列
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Means
Vectors 3D (Three-Dimensional)
Arithmetic
Similar Triangles
Numbers