Answer:
21 (42 for original, 21 is the angle measure divided by 2)
Step-by-step explanation:
First let's start by finding the value of x.
We know that Angle BCA is equivalent to 180-8x+30 so Angle BCA = 210-8x.
Since angles in a triangle add up to 180:
4x+8+2x+2+210-8x=180
-2x=-40
x=20
Now we plug 20 in for x
2x+2=2(20)+2=42
The question asks for the angle measure to be divided by 2 so...
42/2=21
