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多边形旋
Author:
赵林
GeoGebra
New Resources
畫出對稱圖形
第八周作业
四邊形的特性
Nested spiral octagon
直角坐標平面上的旋轉變換
Discover Resources
方格紙上畫長方形2
圓的面積
點與圓的關係
Angles in a Circle:Property 1
勾股定理的直观证明（义务教育数学 新课标-例82）
Discover Topics
Solids or 3D Shapes
Intersection
Expected Value
Upper and Lower Sum or Riemann Sum
Variance