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矩形周长一定时正方形面积最大
Author:
卢德洪
Topic:
Area
,
Perimeter
,
Rectangle
GeoGebra
New Resources
球體建築師
判斷球體
三位數除以一位數（一）
柱體建築師
画直线等分三角形的面积
Discover Resources
風車
(004)80201辛宇婕
奠基
劉徽的「割圓術」的副本
兩位數除兩位數(例子二)
Discover Topics
Tree Diagrams
Limits
Root
Dilation
Trapezium