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焦点弦3
Author:
liu
GeoGebra
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画直线等分三角形的面积
畫出對稱圖形
三位數除以一位數（一）
兩位數除以一位數（一）
兩組對邊相等的四邊形
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橢圓尺規作圖Ex01
Concept of Similarity 相似的概念
Quiz on Quadratic Formula 二次公式：測驗
ppppp
高中物理·小船过河问题
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Rotation
Rectangle
Linear Equations
Solids or 3D Shapes
Percentages