Answer:
11.3 units
Step-by-step explanation:
Let's find the length of one of the boxes.
Let's simplify c down to 1.41.
Now, there are 8 of these little boxes for the perimeter, let's multiply.
That can be simplified to the nearest tenth - 11.3
Hope this helped!
your answer would be -2.57142857143
sry im being Dumb im pretty sure its 180 because intersecting lines form vertical angles if those angles are acute the one in between is obtuve a like is 180 degrees