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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
兩組對邊相等的四邊形
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【案例】圆柱体内放置一个大球六个小球
三位數除以一位數（一）
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Net of a cylinder
用正多邊形面積逼進圓周率
reflectional symmetry_1
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Conic Sections
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Geometry
Cube