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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
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平行線的判定
科赫雪花
百分數及其應用
撒针估算面积实验
折扣
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Basketball
平行四邊形柱算體積(可以切開)
相似三角形的应用
例子
滑桿動畫示範-3(畢氏定理)
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Polygons
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Arithmetic