Respuesta :

mohdsalman

Answer:

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:


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