Answer:
8
add all the angles and set it equal to 180 then solve for x
A.8
Step-by-step explanation:
1. 5(8) - 6
2. 40 - 6
3. 34
Then,
you add up all the angles to make sure they equal 180 degrees
89 + 57 + 34 =
146 + 34 =
180
