X = u + k
hope this helps & hope I get the brainliest answer
Answer: 89/13 km
Step-by-step explanation:
3 4/13 + 2 5/13 + 1 2/13
= 43/13 + 31/13 + 15/13
= 89/13 km
a the side lengths must be = but only opposite angles must be = it COULD be a square but is could be many other things.