Respuesta :

It is 20, cause All angles = 160 and minus them by 180, you get 20. Mark Brainliest if helpful! (sorry for bad eng)

Answer:

20°

Step-by-step explanation:

<DBC = 180 - <BAC - <ACB - <ABD

= 180 - 80 - 50 - 30

= 180 - 160

= 20°