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轴对称图形（翻折问题）
Author:
浅蓝色
GeoGebra
New Resources
第八周作业1
常见四边形是否是双心四边形
异形操场
折扣
平行線的判定
Discover Resources
手表内部秒针结构示意
Yeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeee
Scheimpflug image
威畢特點
Rolling Circle
Discover Topics
Vectors 2D (Two-Dimensional)
Constructions
Equations
Arithmetic
General Quadrilateral