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ghseh 二次函數描點法頂點法-6
Author:
均一
GeoGebra
New Resources
sanjiaohanshu
拼砌四邊形
兩位數除以一位數（一）
四邊形的特性
判斷球體
Discover Resources
Area of polygon
Centroid
ex 3
正六角錐(旋轉，實體、透視)
全等三角形