Find the value of x. Then, find the measure of each angle. This is not a question, but an answer. When I tried answering this question before on another question page it wouldn't work. I am simply trying to help those who might have this question. Anyways here's the
x: 20
Angle H: 58
Angle I: 71
Angle J: 51

Explanation:
4x-9 + 3x-9 + 3x-2 = 180 (180; all triangles add up to 180)
10x-20= 180
+20 +20
10x=200
/10 /10
x=20
H: 3(20) - 2 = 58
I: 4(20) - 9 = 71
J: 3(20) - 9 = 51