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長方形
Author:
Yip Chi Wai
GeoGebra
New Resources
比較五件物件的重量
活动三：应用性质
正方形雪花图案
双心四边形
第三周作业效果演示
Discover Resources
Percentage
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垂直1
Volume of the Cuboid
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Discover Topics
Rotation
Set Theory
Straight Lines
Surface
Fractions