Math
posted by Anonymous .
a diagonal brace is to be placed in the wall of room, the height (y) of the wall is 8 ft and the wall is 16 ft long (x). What is the exact length of the brace?

Use the Pythagorean Theorem.
x^2 + y^2 = b^2
8^2 + 16^2 = b^2
64 + 256 = b^2
320 = b^2
17.888543 = b