Answer:
(x=9)
largest angle= 8x+8(ans=80)
Explanation:
first of all we need to find x
we write this as an equation
8x+8+5x-1+5x+11=180
18x+18=180
18x=180-18
18x=162
x=162/18
x=9
Now the question is to find the largest angle
so
we just find the orginal value for all the angles by replacing the x with 9
1. 8x + 8
= 8x9+8
= 80
2. 5x - 1
= 5 x 9 - 1
= 44
3. 5x+11
= 5 x 9 + 11
= 56
Hence the largest angle is 80 ( 8x+8)
Hope this helped.