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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
斐波那契螺旋弧线（表格法）
盈利與虧蝕
百分數及其應用
第八周作业1
科赫雪花
Discover Resources
圓形,三角形軌跡觀察
翰林B4習p85_10
盾牌
編織圓
椭圆的两条垂直切线的交点轨迹 蒙日圆
Discover Topics
Linear Programming or Linear Optimization
Differential Calculus
Straight Lines
Sphere
LCM and GCD