Respuesta :

Answer:

125°

Step-by-step explanation:

The total must be 180°.

180° - 55°

125°

Answer:

125°

Step-by-step explanation:

Angle on a straight line = 180°

Given angle = 55°

Unknown angle = x°

[tex]x+55=180\\\\x=180-55\\\\x=125\°[/tex]