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三等分点构成的三角形与原三角形之间的关系
Author:
夜雨嘀嗒
GeoGebra
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比較五件物件的重量
盈利與虧蝕
常见四边形是否是双心四边形
活动三:应用性质
百分數及其應用
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百分數
對稱及變換
Sangaku
Properties of a Square
黃金矩形
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Cuboid
Perimeter
Parallelogram
Trigonometry
Angles