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30度直角三角形
Author:
郭勇
GeoGebra
New Resources
拼砌四邊形
柱體建築師
異分母分數減法
小数 的副本
三位數除以一位數（一）
Discover Resources
圓錐截痕
Copy of 閱讀鐘面及數字鐘（時和分）
translation
二維
乘加挑戰題
Discover Topics
Median Line
Means
Integers
Pie Chart or Circle Chart
Cube