Answer:
56
Explanation:
the length of the missing side is 7
so 7 x 8 = 56
To find the missing side:
You must add 8 + 8 = 16
Subtract 16 from the total perimeter = 14.
Divide 14 by 2 = 7 you divide by two since there are two missing lengths and when you add them they have to equal to 14.