您能幫我講一下這個嗎

我看了您的鏈接，還有一個問題。

Given points are,

A = (3, 2),

B = (1, 4),

C = (5, 4)

To find out the circumcenter we have to solve any two bisector equations and find out the intersection points.

So, mid point of AB = [(3 + 1)/2, (2 + 4)/2] = (2, 3)

Slope of AB = [(4−2)/(1−3)] = -1

請問Slope of AB 為什麽是B-A，不是A-B呢？