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日照与杆影变化
Author:
李晓龙
GeoGebra
New Resources
龙形曲线-分形龙
圓的基本性質
第八周作业2
活动三：应用性质
平行線的判定
Discover Resources
scalar multiplication
Drag me~
推移（x 方向）的副本
诱导公式四（原点对称关系）
SolvingEquation_Ver3
Discover Topics
Parallelogram
Scalene Triangles
Plane Figures or Shapes
Rotation
Straight Lines