Respuesta :

levineuwirth

Two angles on a straight line will always equal 180 when combined.

180 - 45 = x

X = 135

altavistard

Answer:

135°

Step-by-step explanation:

These two angles, 45° and x, are "supplementary," which means that they add up to 180°.

Thus, x = 180° - 45° = 135°