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Author:
tan90
GeoGebra
New Resources
Nested spiral octagon
Earth with coastline
畫出對稱圖形
兩組對邊相等和有直角的四邊形
AI 訓練教室
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动态展示圆面积的构成
三角碎形
任意角的三角函数
矩阵（自动）计算（数据为0-5的随机数）
Copy of 閱讀鐘面及數字鐘（時和分）
Discover Topics
Cylinder
Rectangle
Isosceles Triangles
Diagrams
Combinatorics