Va rog ajutatima!! Dau coroană +20 puncte!!
![Va Rog Ajutatima Dau Coroană 20 Puncte class=](https://ro-static.z-dn.net/files/dd7/651df563c870272a737e6fa6c0b32cd3.jpg)
A+B+C=180
180-x-31+180-x-11+180-x-18=180
480-3x=180
3x=300
x=100 grade
A=180-x-31=49
B=180-x-11=69
C=180-x-18=62