Need help with geometry

55 degrees

Step-by-step explanation:

so we only need to focus on the triangle with m<1 we know that it is a right triangle so there's already 90 degrees.

if we do 180 - 145 that gives us another angle measurement which is 35

now to find angle 1 we need to add 90 + 35 = 125

since there's 180 degrees in a triangle we do 180 - 125 and that gives us 55 which is the missing angle