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合 24（附答案）
Author:
Anthony OR 柯志明
GeoGebra
New Resources
Fibonacci Clock
近似值：有效數字
拼砌四邊形
球體建築師
畫出對稱圖形
Discover Resources
angles sum on a striaght line
巴拉拉能量
多項式函數
三角形相似的直观显示.许兴华数学
四邉形 (四年級) 教師版
Discover Topics
Trigonometric Functions
Sphere
Median Line
Expected Value
Equilateral Triangles