To find the diagonal measurement of a 12 x 16 wood deck, you can use the Pythagorean theorem. The diagonal (d) can be calculated as ( d = \sqrt{(12^2 + 16^2)} ). This gives ( d = \sqrt{(144 + 256)} = \sqrt{400} = 20 ) feet. Therefore, the diagonal measurement of the deck is 20 feet.
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It depends on how wide your lengths of wood are.
Using Pythagoras' theorem it works out as 4 times the square root of 13 which is about 14.422 to 3 decimal places
Assuming that the measurements refer to a rectangle, the diagonal would be sqrt(272 + 122) = sqrt(729 + 144) = sqrt(873) = 29.55 ft (to 2 dp)
A 9 x 12 rectangle has a diagonal of 15.
Pythagoras! Diagonal = sqrt (122 + 162) = sqrt 144 + 256 = sqrt 400 = 20