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梯形有甚麼特性？
Author:
Anthony OR 柯志明
English version:
http://ggbtu.be/m79855
GeoGebra
New Resources
四邊形的特性
第八周作业
球体的体积推导（优化版）
畫出對稱圖形
拼砌四邊形
Discover Resources
Copy of 固定周界的長方形的面積變化
螢橋國中 洪芷昀
单晨整体迭代希尔伯特皮亚诺(HilbertPeano)
勾股定理
椭圆的定义
Discover Topics
Correlation
Triangles
Linear Programming or Linear Optimization
Mathematics
Linear Regression