Answer :

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

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