The answer is 2 2/8 or if it needs to be simplified then it would be 2 1/4.
Answer:
36
Step-by-step explanation:
12 x 3 = 36
One centimenter is 0.01 meters. So, you can write the measures as

Once this rewriting is done, getting the total length
is quite trivial, since all measurements are in the same unit, and we can simply sum everything:

The statement is correct because if you were to take a protractor to each corner, it will measure exactly 90°