What is the diagonal feet of a 30x40 building?

Ah, let's paint a happy little picture here! To find the diagonal of a rectangle, we can use the Pythagorean theorem. So for a 30x40 building, we can calculate the diagonal using the formula: √(30^2 + 40^2) = √(900 + 1600) = √2500 = 50 feet. Just like that, we've added a lovely diagonal to our building!