Are two squares with the same side lengths scaled copies of one another

I'm pretty sure, If a square didn't have equal sides on all of itself, it wouldn't be a square.

:3 I'm in elementary my friend made this account for me but purposely put the wrong birth year so I don't know this stuff. :3      

14.3

step-by-step explanation:

add all the numbers together.

9 + 12 + 15 + 16 + 17 + 17 = 86

now, divide 86 by how many numbers we have: 6.

86 / 6 = 14.3