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七彩之珠
Forfatter
李春培
七彩之珠
GeoGebra
Nye Materialer
盈利與虧蝕
平行線的斜率
常见四边形是否是双心四边形
折扣
圓的基本性質
Opdag Ressourcer
angle between lines
Redefining Trigonometry by a Unit Circle
pentagon
二重积分
鏡射的副本
Udforsk emner
Eksponentielle funktioner
Subtraktion
Trigonometri
Sinus
Vectorer 2D (Todimensionel)