Respuesta :

Answer:

115 degrees

Step-by-step explanation:

first find the missing angle in the triangle

75+40+x=180

x+115=180

x=65

That angle plus the ? angle form a straight line, meaning they add up to 180 degrees.

so 65+x=180

x=115

The answer is 115 degrees because adding the two remote interior angles is the same as the one exterior angle .