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勒洛四面体（拼接法）
Forfatter
孟宝兴
GeoGebra
Nye Materialer
四邊形的特性
近似值：有效數字
直角坐標平面上的旋轉變換
Fibonacci Clock
sanjiaohanshu
Opdag Ressourcer
(正)長方體
translation
三角柱
Rotation in the Coordinate Plane
幾何板上的等腰梯形
Udforsk emner
Plane figurer eller former
Histogram
Pyramide
Trigonometriske funktioner
Legemer eller 3D-figurer