Find g.

(QPO lengths: 12 m, 20 m)
(OMN lengths: g, 5 m)

Using the Law of Cosines, we can solve for g:

g^2 = 12^2 + 20^2 - 2(12)(20)cos(O)

Since cos(O) = -1/2 (since it's a 2-3-5 triangle), we have:

g^2 = 144 + 400 + 480
g^2 = 1024

Taking the square root of both sides gives us:

g = 32

Therefore, g is 32 meters.