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探究位似的性质（制作：王权龙，修订：孟宝兴）
Forfatter
孟宝兴
GeoGebra
Nye Materialer
Perpendicular Lines: Quick Exploration
繪畫垂直線
Isosceles Right Triangle
Squaring a Rectangle (PST Version)
Rotating Custom Polygons Around an Axis
Opdag Ressourcer
Domein en bereik van een parabool
Night and Day Length
H Linear EQ's (SoE)
Parallel Lines by Angle Copy
Rectangle Rhombus Square
Udforsk emner
Cirkel
Lineære funktioner
Sandsynlighed
Spejling
Linjestykke