Respuesta :
Answer: x = 15
Step-by-step explanation:
All angles add up to 180.
9x + 3x = 180
12x = 180
x = 15
I am pretty sure this is correct. Hope this helped.
Answer: x = 15
Step-by-step explanation:
All angles add up to 180.
9x + 3x = 180
12x = 180
x = 15
I am pretty sure this is correct. Hope this helped.