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Measuring areas by placing different shapes
Author:
Shum Kwok Ching
,
GeoGebra Institute of Hong Kong
GeoGebra
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三位數除以一位數（二）
異分母分數減法
兩組對邊相等的四邊形
画直线等分三角形的面积
判斷球體
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認識正方形
星球運動模擬
so fing
Animation of Refraction
常用對數
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Matrices
Orthocenter
Arithmetic Mean
Kite
Quadratic Functions