Around 17.8. I did this with cossin, but check the answer with a calculator
38.42 feet.
43.26661530556787
The dimensions given appear to describe a rectangular box, with 3 separate pairs of rectangles: 4X8 -> Diagonal is 8.944 ft 4X12 -> Diagonal is 12.649 ft 8X12 -> Diagonal is 14.422 ft
Perimeter of [ 16 x 26 ] rectangle = 16 + 16 + 26 + 26 = 84-ft . Perimeter of a 20-ft square = 4 x 20 = 80-ft . The rectangle has the greater perimeter.
20 ft
Using Pythagoras' theorem it is 40 feet
18.9 feet
Around 17.8. I did this with cossin, but check the answer with a calculator
18.9 feet
The diagonal is 7.21 feet.
114.826 ft
38.42 feet.
43.26661530556787
To find the answer, use Pythagorean theorem. You have a and b, and want c. c=square root of 16 squared plus 24 squared = 28.8444
57.3062 ft
97.617 ft