Answer:
the diagonal distance from one corner to the opposite is 15 feet.
Explanation:
using the pythagorean theorem, we know that a^2 + b^2 = c^2. if a=9 and b=12 we can set up our equation as follows:
9^2 + 12^2 = c^2
81 + 144 = c^2
225 = c^2
the square root of 225 is 15 therefore:
15 = c