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三角形的外心
Author:
真呷意
外心
GeoGebra
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異分母分數減法
找出對稱軸
画直线等分三角形的面积
三位數除以一位數（一）
兩位數除以一位數（一）
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task5
Opp angles cyclic quad
椭圆的两条垂直切线的交点轨迹
活工(三)Q2
工作紙(1) 思考題
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Median Line
Logarithmic Functions
Interest Calculation
Fractions
Trigonometry