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中心旋转
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浅蓝色
GeoGebra
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正方形雪花图案
常见四边形是否是双心四边形
平行線的判定
中华人民共和国国旗
活动三：应用性质
Discover Resources
數學作業
正立方體內的正四面體
ie 6
空間兩直線關係
推移（x 方向）的副本
Discover Topics
Arithmetic Operations
Linear Equations
Vectors 3D (Three-Dimensional)
Sequences and Series
Curve Sketching