Answer:
The two shortest diagonals seems to be RU and TS. A further explanation is provided below.
Explanation:
The given coordinated are:
r = (1, 1)
s = (6, 1)
t = (8, 5)
u = (3, 3)
Now,
The distance between RU will be:
=

On putting the values, we get
=

=

=

=
