數學問題the distance between a and b

2008-06-01 9:11 pm
the distance between a and b
我搵到ab係57km
但係書ans係114km,我想問the distance between a and b
呢句野係咪2倍ga

回答 (1)

2008-06-01 9:25 pm
✔ 最佳答案
the distance between a and b = a 和 b 兩點既距離
點解會係兩倍呢??
the distance between a(x1,y1) and b(x2,y2)
= sqrt[ (x1 - x2)^2 + (y1 - y2)^2 ]
sqrt[ ] 係平方根
係咪運算錯誤?? 小心再計多次


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