Respuesta :

Lola3571

Answer: 249

Step-by-step explanation: 180° is half a circle which is AB and you need to find the ABC arc, so you add 180+69=249°

Answer:

180 degrees.

Step-by-step explanation:

If diameter AB forms half of a circle, then that is 180 degrees. Arc ABC is the other half of the circle. Therefore, 180 plus x equals 360. Subtract 180 from both sides and you get 180 degrees. Hope this helps!