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正十二面體內接正四面體或內接正六面體
Author:
侯杰材
GeoGebra
New Resources
第八周作业
四邉形 (四年級) 教師版
兩位數除以一位數（一）
兩組對邊相等和有直角的四邊形
画直线等分三角形的面积
Discover Resources
國道etag收費
ggb-fs-b1 分數擴分
時鐘
中心对称的概念
Copy of 分數與小數
Discover Topics
Means
Rational Numbers
Rotation
Linear Programming or Linear Optimization
Straight Lines