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ie 7
Author:
LAM YU SANG
GeoGebra
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四邊形的特性
画直线等分三角形的面积
找出對稱軸
三位數除以一位數（二）
兩位數除以一位數（一）
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圍棋名人賽
教學－直線方程性質
三圓相切
向量分解：解聯立
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Discover Topics
Histogram
Volume
Frequency Distribution
Exponent
Definite Integral