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ruler
Author:
felixchow
菱形
GeoGebra
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直角坐標平面上的旋轉變換
兩組對邊相等的四邊形
判斷球體
異分母分數減法
錐體建築師
Discover Resources
平行綫的斜率
Decimal
Rectangle_02
正三角形堆垛
等腰三角形求角度
Discover Topics
Triangles
Piecewise Functions
Terms
Kite
Rotation