Answer:
Step-by-step explanation: When solving the perimeter for a quadrilateral you will add up all the sides and the all sides are the same so when you figure out the number from one side you will figure the rest of it. I think that one of the sides is 10 I'm not really sure but you you should the little square outside the shape and it should give you the answer to it.
I don't know if it is 10 or not and also the formula is P=a+b+c+d
Hope this advice helps :D
