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三角形五心與角度關係
Author:
lihsing.zen
Topic:
Mathematics
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畫出對稱圖形
画直线等分三角形的面积
算柱 (兩位數)
四邊形的特性
三位數除以一位數（二）
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Slope 斜率 - 概念及定義 (3)
座標工具檔
題1
軌跡教學
拋物線5-包絡線法
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Circle
Random Experiments
Real Numbers
Calculus
Statistics