So the angles combined should be 360 and we already know h is 90 degrees. so the rest should equal 270. Just set up an equation of:
9x + 14x + 4x = 270
then solve for x, first combine like terms
27x = 270
then get x alone by dividing
x = 10
then plug 10 into the problem next to angle f: 14x
14 * 10 = 140
