Question

Ed is setting up the locations of the corners of a 12-foot by 5-foot rectangular deck he is going to build in his backyard To make sure he has a perfect rectangle. What should the length diagonal be?

Answer 1

use pythagorean theorem:

d^2 = 12^2 + 5^2

d^2 = 144 + 25

d^2 = 169

d = sqrt(169)

d = 13

the length of the diagonal should be 13 feet