Answer:
3
Step-by-step explanation:
if the shapes are similar then the measures are proportional:
4/12 = 1/d cross multiply expressions
4d = 12 divide both sides by 4
d = 3
<span> A, B, and C and also F because a negative number can't be under radical </span>
Here is the equation you should use: x + 2x - 12 = 180
You will be solving for x.
Combine like terms then add twelve to both sides of the equation.
3x = 192
Divide by 3 on both sides of the equation.
x = 64
Now, plug 64 in the equation for x.
2(64) - 12 = 116