Bài 18

import math

x1, y1, z1 = map(float, input("Toa do A (x y z): ").split())
x2, y2, z2 = map(float, input("Toa do B (x y z): ").split())

AB = (x2-x1, y2-y1, z2-z1)
do_dai = math.sqrt(AB[0]**2 + AB[1]**2 + AB[2]**2)
trung_diem = ((x1+x2)/2, (y1+y2)/2, (z1+z2)/2)

print(f"Vecto AB = {AB}")
print(f"|AB| = {round(do_dai, 4)}")
print(f"Trung diem M = {trung_diem}")