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椭圆的定义
Author:
梁航宇
GeoGebra
New Resources
兩組對邊相等的四邊形
第八周作业
画直线等分三角形的面积
三位數除以一位數（一）
錐體建築師
Discover Resources
Net of a cylinder
Spotlight 探射燈
square and circle
自动变大标签模板
圓周公式應用題2的副本
Discover Topics
Division
Solids or 3D Shapes
Random Variables
Means
Set Theory