Respuesta :

bengisu898

Answer:

m4=m1+m2

Step-by-step explanation:

m1+m2+m3=180

m3+m4=180

m3=180-m4

m1+m2+(180-m4)=180

m1+m2=m4

236978920
I also did this and im not sure if im right but i got A for the answer so i think its the first one