fplzzzzzzzzzzzz?va rogggggggggggg
![Fplzzzzzzzzzzzzva Rogggggggggggg class=](https://ro-static.z-dn.net/files/db5/079b8ee518940577dd0aa9973c994fa1.jpg)
Răspuns:
Explicație pas cu pas:
a= 180 -138 = 42 grade
b = a = 42 grade
c = 138 grade