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Multiplication of Directed Numbers
Author:
chisunch1
GeoGebra
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判斷球體
四邊形的特性
兩位數除以一位數（二）
兩位數除以一位數（一）
畫出對稱圖形
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直線方程式--斜率比較
Problem1:(md+me+mf)/(ad+be+cf)=a
極式：切線方向
学用数学
多边形旋
Discover Topics
Functions
Straight Lines
Dilation
Orthocenter
Hypothesis Testing