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拋物線之極偶 / polarity for parabola
Forfatter
XIE Yuheng
GeoGebra
Nye Materialer
球體建築師
兩組對邊相等的四邊形
兩位數加法
兩組對邊相等和有直角的四邊形
畫出對稱圖形
Opdag Ressourcer
簡單動畫
斯霍滕(Schooten)定理(與角平分線定理等價)
Combined Quiz on Bearings 方位：合併測驗
Test
長度和距離(毫米)
Udforsk emner
Grafskitsering
Algebra
Parabler
Vectorer 2D (Todimensionel)
Lineære ligninger