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Author:
孟宝兴
GeoGebra
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兩組對邊相等和有直角的四邊形
兩組對邊相等的四邊形
四邊形的特性
四邉形 (四年級) 教師版
直角坐標平面上的旋轉變換
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三心：與三角形形狀的關係
加法運算
第四組-圓冪定理
Trigonometric Ratios of Any Angle
圓內接四邊形的圓周角
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Power Functions
Algebra
Linear Equations
Probability
Pie Chart or Circle Chart