Respuesta :

Astute
Hello there!

Sense this is a 360 degree angle, it is divide by 2. This would then be considered 180. If you (noticed) on the other side, it shows us that . . .

[tex]AB=19 \\ and \ AB=CD[/tex]

We then do (180-19)

[tex]DC= \ \boxed{161}[/tex]