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梯形面积1
Author:
杨华
GeoGebra
New Resources
兩位數除以一位數（二）
GeoGebra笔记功能体验课件
判斷球體
兩組對邊相等和有直角的四邊形
畫出對稱圖形
Discover Resources
三角形全等的理由 – 題4
車線.ggb
兩點長度
xsin(x)
球体的截面
Discover Topics
Linear Regression
Diagrams
Mathematics
Equilateral Triangles
Normal Distribution