Solve this problem I tried it for 3 days but I couldn't get it I am just clueless what to next please can we solve this problem together?

Answer:
a= 2.15 (round to 2.2)
Explanation:
A= 32 degrees
B= 68.4 degrees
C= 80 degrees
a= 2.15 (rounding to 2.2)
b= 3
c= 4
I hope this helped you :)