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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
兩組對邊相等和有直角的四邊形
兩位數除以一位數（一）
第八周作业
異分母分數減法
画直线等分三角形的面积
Discover Resources
任務2
Rectangle_05
旁心三角形的九點圓
算幾不等式
光圈与正多边形外角和
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Arithmetic Operations
Probability
Binomial Distribution
Root
Kite