Respuesta :

I think C.12

5*12 is 60
60+80 is 140
And I think it’s a 140 degrees
valentinamcasey

Answer:

12

Step-by-step explanation:

The total of your angle is 140. You already know there is 80 so subtract that.

Now you are left with 60, and 5x. Since you are trying to find x, just figure out what times 5 equals 60. 12×5=60. Hope I helped you! Have a great day :3