Answer:
208.571 if u round it it might be 209
Step-by-step explanation:
52.1429 weeks in a year X 4= 208.571
208.5714
how many weeks are in 4 years
56
The missing side is 9cm.
How I got my answer:
1. Squares have equal sides.
2. The area is 81cm^2, so we have to divide 81 by 9.
81 : 9 = 9cm.
