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圆心可变的扇形在x轴上滚动
Author:
赵林
GeoGebra
New Resources
兩位數加法
拼砌四邊形
兩組對邊相等和有直角的四邊形
畫出對稱圖形
算柱 (兩位數)
Discover Resources
圓周 (圖形G)
圖形的繪製(7)---端點在軸上的固定長線段
gjzbh 矩陣與遞迴關係（3階）
DSE Mathematics
KS2 數學
Discover Topics
Angles
Similarity Transformation or Similarity
Geometric Mean
Cuboid
Bar Chart or Bar Graph