Respuesta :

Answer:

x = 55

Step-by-step explanation:

A triangle has angles that add up to 180, so lets make an equation

25 + 100 + x = 180

125 + x         = 180

-125                -125

         x         = 55

Tell me in the comments of this answer if you have any questions! If you could mark this answer as the brainliest, I would greatly appreciate it!