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全等三角形
Author:
孟宝兴
GeoGebra
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兩組對邊相等和有直角的四邊形
錐體建築師
三位數除以一位數（一）
兩位數加法
找出對稱軸
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優良作品1(沛綺)
拋物線定義
正20面體展開
圆锥曲线的统一画法.许兴华数学
中心投影、平行投影
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Median Value
Parabola
Ratios
Logic
Difference and Slope