Respuesta :

Answer:

x=25

Step-by-step explanation:

125+30= 155
180-155=25

180 is the overall total of the line so the angels will add up to 180

thishigopal

Answer:

x = 25°

Step-by-step explanation:

angle of st line is 180°

125+30+x = 180

155+x=180

x = 25°