It says to find the value of x, having a hard time understanding how to do this one.

First Area of the triangle=180 Degree

I,e ∠A+∠B+∠C=180°

Given ∠A= 21

          ∠B=34

          ∠C=X

∠A+∠B+∠C=180°

21+ 34+ x°=180°

55+x=180°

x°= 180-55

x= 125°

Step-by-step explanation:

in total they made   333.74 your welcome : d