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it's for fun
Author:
dunst kang
it's for fun
GeoGebra
New Resources
找出對稱軸
畫出對稱圖形
画直线等分三角形的面积
判斷球體
球体的体积推导（优化版）
Discover Resources
四邊形四個九點圓共點
DSE Mathematics
三角形的底和高
拋物線3-平行四邊形法
跳棋棋盘
Discover Topics
Constructions
Standard Deviation
Expected Value
Fractions
Correlation