I think it should be F=45
Answer:
Formular for coordinate length:

In considerance of coordinates given of A and B

therefore substitute:

Harrison walked a total of 14 km because the first rectangle has a perimeter of 6 km and the second has a perimeter of 8 km. Harrison’s brother walked a total of 12 km since that was the perimeter of the 5*1. 14-12 is 2 so there is a 2 km difference.
Correlation between Ice cream sales and sunglasses sold Causation takes a step further than correlation