Question 490397
You can use the law of sines

40/sin112 = 15.3 /x
x = sin 20.77, the angle opposite the 15.3 cm side.
For a check, using the law of sines the angle opposite the 32 cm side = 47.88.
47.88 degrees + 20.77 degrees + 112 degrees = 180.65, approx 180.
Cleomenius.