Respuesta :

Answer:

3.5

Step-by-step explanation:

8.5 are the long sides

8.5+8.5=17

24-17=7

so both short sides add to 7

7 divided by 2 = 3.5

Answer:

Hey!

Your answer is 3.5cm!

Step-by-step explanation:

We are given one side's length... 8.5cm

As there are 2 sides we add (or multiply by 2) these sides together...

8.5 + 8.5 = 17

We are missing two shorter sides now...

So we have to divide 17 by 2 to get...

17 / 2 = 3.5! *this is your answer!*