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設△ABC的三個頂點座標是:A(x1,y1),B(x2,y2),C(x3,y3)1)三角形重心是三邊中線的交點,其座標是((x1+x2+x3)/3,(y1+y2+y3)/3)2)過點A把△ABC的面積等的直線經過BC的中心:((x2 +x3)/2,(y2+y3)/2)方程是X-x1=(Y-y2…
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