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凸透镜成像规律的动态演示
Author:
肖建伟
GeoGebra
New Resources
第八周作业
画直线等分三角形的面积
讀磅
球体的体积推导（优化版）
直線的斜率
Discover Resources
拋物線作圖Ex1
複合圖形表面積(一)
圓錐切球
q1: triangle with 3 equal part
圓內接四邊形任務二
Discover Topics
Expected Value
Orthocenter
Square
Arithmetic
Equilateral Triangles